I am not sure where you would get that from? We use hosttracker to track our up time from 77 different world wide locations at 5min intercals and the only down time was today, and it was minimal.
http://host-tracker.com/en/website-monitoring-info/469371-469372/lvuc/The only down time for the last quarter was 24min which happened today. Not a minute of downtime or mysql problems yesterday or "the last 3 days" as you mentioned. Are you sure you are checking the correct host? Could there be connectivity issues on your side? If you are using free hosting, who's mysql server/db are you using?