If you need to get the number of hits per minute from your Apache access log, you can do the following:

cat access.log | cut -d [ -f2 | cut -d] -f1 | awk -F: '{print $2":"$3}' | sort -nk1 -nk2 | uniq -c

If you wish to filter it down by a specific vhost, or file, you can replace the cat with a grep, like so:

grep myfile.zip  access.log | cut -d [ -f2 | cut -d] -f1 | awk -F: '{print $2":"$3}' | sort -nk1 -nk2 | uniq -c