"Daddy, can I see you today?"
Got that text from my 19 y/o.  Seen her a few times.  She's fun but can get annoying after too long.  We have plans for tomorrow night.

"Hey babe, wyd this weekend?"  
From my 30 y/o half latina, half asian SB.  Been seeing her 1-2 times a month for a year now.  She has a weird work schedule so we usually have to book in advance.

Two other "Hey" from other girls I'd seen a while ago but stopped.

Best time to negotiate PPM are the last several and first several days of the month. JMO