Well, good news! I just got off the phone with the IRCC call centre and learned that only FULL days count in the 183 days/4 year criteria for the need for a police certificate. As I commuted home each night after work, those days do not count toward the 183 days.
I was able to originally able to apply for PR only after several years in Canada due to employment status and the streams available at the time. It seemed to take a long time to finally receive PR status and was not looking forward to another extended wait for filing for citizenship. This is a huge relief. Time now for some champagne....