Get connection count over a period of time

I used this script to get the connection to a domain in two specific minutes. I need to extend to give result over a range of minutes.

The below gives total number of connections in the minutes 00:40 and 01:13 on 22nd March.

 egrep "22/Mar/2013:00:40|22/Mar/2013:01:13" /usr/local/apache/domlogs/domain.com  | cut -d[ -f2 | cut -d] -f1 | awk -F: '{print $2":"$3}' | sort -nk1 -nk2 | uniq -c | sed 's/[ ]*//'
5 00:40
1 01:13

I need the script print number of connections in each minute from 00:40 and 01:13

egrep "22/Mar/2013:00:[45][0-9]|22/Mar/2013:01:0[0-9]|22/Mar/2013:01:1[0-3]" /usr/local/apache/domlogs/domain.com