Request per hour

cat access.log | cut -d[ -f2 | cut -d] -f1 | awk -F: '{print $2":00"}' | sort -n | uniq -c

request per hour by date

grep "23/Jan" access.log | cut -d[ -f2 | cut -d] -f1 | awk -F: '{print $2":00"}' | sort -n | uniq -c

request per hour by IP

grep "XX.XX.XX.XX" access.log | cut -d[ -f2 | cut -d] -f1 | awk -F: '{print $2":00"}' | sort -n | uniq -c

requests per minute:

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

requests per minute for date:

grep "02/Nov/2017" access.log | cut -d[ -f2 | cut -d] -f1 | awk -F: '{print $2":"$3}' | sort -nk1 -nk2 | uniq -c

requests per minute for url:

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

per IP per minute

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

Source: https://serverfault.com/questions/226982/how-to-measure-req-sec-by-analyzing-apache-logs