bobisme

If someone were regularly overworked, averaging say 60 hours per week, would it be reasonable to claim 1.5x "years of experience" with a given technology during that period?

Say if someone often worked 70-90 hours per week and worked on holidays and didn't take vacation for 5 years. How could somehow reflect that experience on a résumé? Would it be fair to at least claim 7 years experience for that time?

Thanks