At SIA, 1000 sectors on aircraft over 5700kgs with up to half of these countable from previous operations. In real terms depends on which aircraft you operate as F/O.
Go to the A310 or B777 and you'll have the requirements in about 6-7 years. Those who went straight to the A340/B747 will wait up to 9-10 years.
Ab initios have a min. time bar also of 8 years as F/O.
These times have occasionally been achieved, but are often exceeded due to "operational indiscretions" viewed badly by those upstairs!
The earlier SIA entry was not entirely correct!