Cycle Days When a person is Irregular

Andrea • Im A Mother Of 1 Biologically And Have 2 Step Kids One Who Belosngs To My Ex Husband Which I see Him Every Year And A Step Daughter Who Belongs To My Husband We Have Custody Of Her. I Like Sports,
How Do You Calculate Cycle Days When A Person Has Irregular Periods, I Started My Period Sept 18th And Ended Sept 24 Then In October I Started Oct 31st And Ended Nov 6th. HELP Please