Multiple emails, can't remember one password

Laurie Schons

New Email
I began at work with one email account through frontier. We then moved and a new gmail account and business account were set up. The gmail account is my default and all 3 go to this email. We were set up with a new server at work and after many years, I know 2 new recent gmail accounts' passwords, but can 't remember my frontier password. How do I go about to find and/or change this password I am unable to remember? I continually get a pop up because of it and need it to stop!