inheritable vs lineal

inheritable

adj
  • Capable of taking by inheritance, or of receiving by descent; capable of succeeding to, as an heir. 

  • That can be inherited. 

lineal

adj
  • Inheriting by direct descent; having the right by direct descent to succeed (to). 

  • Composed of lines; delineated. 

  • In the direction of a line; of a line; of or relating to a line; measured on, or ascertained by, a line; linear. 

  • Having an ancestral relationship to mothers, fathers, grandparents, (etc.) and having a descendant relationship to sons, daughters, grandchildren (etc.), exclusive of collateral siblings. 

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