heritability vs inheritedness

heritability

noun
  • The condition of being inheritable 

  • The ratio of the genetic variance of a population to its phenotypic variance; i.e. the proportion of variability that is genetic in origin 

inheritedness

noun
  • The state or quality of being inherited. 

How often have the words heritability and inheritedness occurred in a corpus of books? (source: Google Ngram Viewer )