You can use COUNTIF to count the number of elements that match a condition.
Suppose you have your numbers in column A, say from A1 to A10:
A1: 1
A2: 3
A3: 7
etc...
Type in somewhere on your sheet, say in column B, the values you are interested in:
B1: 0
B2: 1
etc...
and in C1, type in
=COUNTIF($A$1:$A$10, B1)
This should count the number of values equal to B1 (i.e. 0), in A1:A10.