number in

number in something

to total up to a certain figure. The birds numbered in the thousands. These pesky ants number in the hundreds. Let's move to another picnic table.
See also: number
References in classic literature ?
The fantail has thirty or even forty tail-feathers, instead of twelve or fourteen, the normal number in all members of the great pigeon family; and these feathers are kept expanded, and are carried so erect that in good birds the head and tail touch; the oil-gland is quite aborted.
If you want the date nine months ago, use a negative number in the formula, such as: =EDATE(NOW(),-9).