Bash: check for multiple occurrences within a given time frame -


i looking way have script check multiple occurrences of line report true if happened in 5 or 10 minute interval anywhere in file. 

#!/bin/bash   var1=$(/bin/grep -i 'string match' /var/log/logfile.log | wc -l)  if [ "$var1" -ge 10 ];  echo " string match exceeded 10 times" exit 2 fi

so basically, if see 10 or more string matches occur anywhere in logfile long occurred within 5 minutes of each other need change or add?

fyi logfile date format looks this:

2016-06-01 18:58:00.307

i not sure 3 digit # appended end of date.


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