A bit like claiming you have an 80% success rate with your forecasts, when in fact it only relates to approx 42 days of the year.

I'll keep reminding you of the formula, in case you've forgotten, until you stop trying to take the moral high ground over making a forecast.

Approx 1 forecast a week with an 80% success rate = 41.6 days a year (52 x 80%).