Some serious questions for the hobbyist here.

If you are sending & receiving thousands of text per month, you probably don't need the notice feature for google. Just check text messages when you have a spare moment, or better yet, check with your wife in your spare moments! lol

I do it on weekends or when I just don't feel like working. Go into the settings, and just turn off push notifications, as well as go into Do Not Disturb so you have to go into the app to check them.

Just get TWO phones. Done deal. ONLY give your hobby/burner number to providers so the FWB chick will never see them. Keep the phone at your office, in a locker at the gym, etc. It's not rocket science. You should not ever be using your main phone (the one in your REAL name) for illegal pursuits in any case, Forget about the woman... there are far worse things to worry about.  

I think that would be the easiest thing to do.

Call the day of for the hotel/incall and get to know each other, and a text for the exact location. That's a rap.

You can disable displaying text when phone is asleep on iPhone  
I am sure you do the same in android also.  

At least that's the way I read his post. As to your other reply below, it's the FWB he's getting thousands of texts from, not providers.

Well, my advice is still the same be it hooker or FWB he is hiding. Get another phone for just that purpose, or get google voice. His wife can easily get a copy of his phone bill. Sure, it's against the law and all, but try blowing the cell phone carrier and see what info. he comes up with.  

She sounds crazy.

Not having any unnecessary communications with the other party. Other than scheduling a rendezvous.

Fickle White Bitch

If you are getting bucket loads of texts...  this is no longer a FWB.  This is an affair with feelings & emotions.  This is a line we stay away from by hobbying.  This is far more dangerous.  Far more likely to be discovered.  Ask Tiger!!  
I don't know how to help you as I'm just using a dumb hobby phone.  I'm also reading that you have a SO & this FWB.  You've got to get this under control & quickly.

Let me say you are heading down a very slippery slope and you need to be extremely careful.  London is right, the same basic principals of the hobby apply.  First, my advice is to walk away from the FWB, which sounds much more like a serious affair and return to seeing providers.  Didn't you see fatal attraction??? I am pretty sure none of the lovely ladies I have seen in the hobby were ever going to boil a bunny let alone contact wifey.  When emotions get involved, and things don't work out, things can really blow up in your face.  If you still insist on going down this path I recommend:

sounds like the friends thing is out of hand, not the benefits. she really wants to be friends, even more than a wife

in this case F could stand for Feckless.

If she is constantly texting as it appears she is...  she's not with the 'something on the side' program.  It seems that this 'FWB' is indiscreet.  If you get caught, you go through the wringer...  but there are those who are not above breaking up a marriage.  If you don't mind getting divorced, then do so first on your own terms, not later...  when you are caught...  and the wife has all the ammo.

You don't have enough feck.

Aw feck!

He said "We" several times so it seems like THEIR texting is realty a lot. No where does he say he wants it to change, he's asking how to hide it.

Steph

All they have to do is stop the excessive texting.

We also slept together about six nights out of the week. So the two are not mutually exclusive.

I also text about a half dozen different hookers in Costa Rica on a pretty regular basis, of course the difference with me is that I have no reason to need to hide it.

I pointed out that he considered it a "we" thing and people were responding like SHE was doing something he didn't like.

I way some people text message each other today is CRAZY to me, but that wasn't what he was asking about.

Steph

both positive and scathing