After one year, we will move her to her crib in a separate bedroom. My son starts to suckle for comfort only. He has the occasional night when he wakes up often. I just snuggle him close and he falls off again. I think he rolls away and can't feel me close and wakes on those nights.
All children are different.
My son is nine months old and still has some restless or wakeful nights. When he sleeps for five or six hours straight I consider him to be sleeping through the night. From everything I have heard, sleeping through the night means going seven to eight hours without waking to eat, but waking to get comfortable is normal. Take my advice with a grain of salt. Things have been working out so far.