If a trait A exists in 10% of a population of an asexually reproducing species and a trait B exists in 60% of the same population, which trait is likely to have arisen earlier?

Asexually reproducing species show very few variations which are seen usually due to mutation. Any such variation in an individual takes time to become considerable part of the population as it shows up only in individual's progeny. Therefore, if a trait A exists in 10% of a population of an asexually reproducing species, it must be a recent variation and if a trait B exists in 60% of the same population, it is likely to have arisen earlier.