determine the total number of (a collection of items).
I started to count the stars I could see
add up,add together,find the sum of,sum up,reckon up,figure up,calculate,compute,enumerate,total,tally,add,tot up,cast up,keep a tally of,keep a count of,keep a record of,count up,count off,tell,work out
an act of determining the total number of something.
at the last count, fifteen applications were still outstanding