I have seen, I believe Russian, monastic practice where there is a set number of prayer ropes of Jesus Prayers and "Most Holy Theotokos, Save us" for each of the various Offices.
Duh da daaaaa! Old Believer's Prayer Book to the rescue! (And no, I'm not an Old Believer; I just like the translations of the office and canons.)
Well. This would be a long post if I tried to post the whole table, so I'll just post the numbers for the Jesus Prayer for the Office:
Vespers: 600 prayers
Great Compline: 700 prayers
Small or Middle Compline: 400 prayers
Nocturn: 600 prayers
Matins: 1500 prayers
1st, 3rd, 6th, and 9th Hours: 1000 prayers total
Hours with the Interhours: 1500 prayers.
That's quite a few prayers, and they also list the numbers for praying with bows during the Jesus Prayer and with the Psalter. Plus, the prayer rope is quite different from the typical knotted or beaded one. I could quote from the Prayer Book, but I'm feeling lazy at the moment, so if anyone shows any interest, I'll pop back on and do that. Peace.