The form asks for month and year, so there is no way for them to see a 1 day gap. They can only see a month missing, for example, one entry says "2010/08 to 2010/09" and the next one says "2010/11 to 2011/05"; 2010/10 is missing. There is no way to see that 2010/09/14 or 2010/12/22 is missing.
It doesn't need to be super specific; CIC tells you in the question what kind of explanation they want, "working, unemployed, studying, travelling, retired, in detention, etc". The broad explanation, not day-to-day specifics. My partner spent a lot of time travelling. He had entries like "2004/02 to 2004/10, Backpacking, Australia." He didn't break it down into every single city and town, every single activity.