The rhythm you use when you are telling someone your phone number (in person not in a text). Usually area code (pause) first three numbers (pause) and the the last four numbers.
Bob: Hey, what are your phone numbers?
Phil: Oh, It's 555 555 5555.
Bob: Okay, and you Ted?
Ted: Mine is 4444 44 444.
Bob: Dude, you got bad Phone-Number Rhythm!