There was a provider that I like and I wish to see her once a week, but would that creep them out? I don't want to scare them away or anything but I prefer seeing some people regulary rather than trying new ones all the time.

Gals do like regulars, and often see some guys as much as once a week; however, it you start to get too clingy and she sees a line crossed, then yes, that can be a problem for her; and for you too I might add.

I agree with Mr Fisher 110%.  Once a week is probably not excessive IF you can keep your head on straight.  It is VERY easy to fall for providers we have great sex with & going exclusive can really build the risk.  This is the normal & correct hormones of "Protect the women & children" at work.  
You would have to be constantly on guard to not fall for her...  or even seem like you might be.  Clingy clients can become stalkers, endanger her safety & her business...  and she'll refuse to see you at all.
You might want to consider a few Favorite ladies whom you can rotate or give you choices.  I became exclusive with my first Fav but forced myself to take a several months long break to get my perspective back, so I know what I am talking about.  I'm certain other experienced guys will back me up on this.
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No, as long as you don't cross the line.  This is a fantasy and must remain such.

Also, be sure you keep the envelope filled.

IT is too easy for a newbie to become fixated on a provider early in the game. This will lead to problems for both client and provider, and will result in your not enjoying the variety and the critical learning experience that only comes with experiencing a variety of providers.

I recommend that you save becoming a regular for after your first at least 20 reviews.

There are many downsides and pitfalls to seeing a provider on a regular basis. Keeping the service level up, maintaining boundaries, and handling the development of a "relationship" with a provider are not for the inexperienced or faint of heart....

Providers love regular clients.  They get to know your likes and dislikes and the encounter is more comfortable.

If, however, you are looking to see them off-the-clock, they may have objections as we all have personal lives and you also may be cutting into their business appointments.

This could be OK (have to check with her) if you have already been seeing her a while, but I also agree about the noobie thing...

Don't do it. Try monthly.

Well the thing is the reason why I go to the provider is because she is friendly and allows me to try many different positions. Also she isn't too far away.  I actually don't even find the provider attractive and she doesn't even speak any English.  So I don't even have any attraction to her and no chemistry.

Is three times a month considered ok to be safe so the agency doesn't think I am a stalker?

I think the rules in this game are the same as in dating.  Once you are spending too much time with a lady she will start to take your for granted.  This means she will not perform as well and at times she may even start saying things to you that are not appropriate.  If you keep a some distance then every time you see her she would have built up some anticipation to see you and then you are in a power position.  You can be nice, you can like a woman, but never lose your guard...

What do you think is a good number to visit a provider without being too close.

My position is that you want to keep it to once a month and periodically you have to give a break of multiple breaks and see some other ladies in the break.  Ultimately, you want a good rotation.  I think if you have about five or six different ladies who you develop a good friendship with you can create a rotation where you will always be happy and the women will not start taking you for granted.    Note:  If they are in the same town, it is good not to let them know about each other.  Use other women who you do not like as much for the references.  You see, sometimes you may meet a woman that you are not really that pleased with but just be nice anyway because such a person can be a good reference for you to set up your premier stable of ladies.   Good luck.

how about different girls but all from same agency?

Me and and sinful used to see each other all the time, than she got too attached to me and wanted me to be her sugar daddy and I just.....oh wait, I am fantasizing now lol.

Girls love regulars, but after a while, they will let you know its time to move on when they stop seeing you less and less.