AWK script to show number of apache hits per minute

Documenting this script,  to save me the time of rewriting it time and again on different servers

 tail -n100000 www.access.log|awk '/09/Apr/{print $4}'|awk -F'[' '{print $2}'|awk -F':' '{print $1":"$2":"$3}' |sort -n|uniq -c

This shows output like this

 21 09/Apr/2015:12:48
 21 09/Apr/2015:12:49
 21 09/Apr/2015:12:50
 21 09/Apr/2015:12:51
 21 09/Apr/2015:12:52
 711 09/Apr/2015:12:53
 1371 09/Apr/2015:12:54
 1903 09/Apr/2015:12:55
 2082 09/Apr/2015:12:56
 2256 09/Apr/2015:12:57
 2123 09/Apr/2015:12:58
 1951 09/Apr/2015:12:59
 1589 09/Apr/2015:13:00
 1427 09/Apr/2015:13:01
 811 09/Apr/2015:13:02