Rotate count
The rotate command determines how many archived logs are returned before logrotate starts deleting the older ones. For example:
rotate 4
This command tells logrotate to keep four archived logs at a time. If four archived logs exist when the log is rotated again, the oldest one is deleted to make room for the new archive.
Logrotate will keep rotating the logs and not let the size of the log file grow. Old log files might need manual deletion.
You might find this worth a read through.
https://docs.rackspace.com/support/how-to/understanding-logrotate-utility
Thanks, I will give it a read.