lineage vs posterity

lineage

noun
  • Descent in a line from a common progenitor; progeny; descending line of offspring or ascending line of parentage. 

  • A number of lines of text in a column. 

  • A fee or rate paid per line of text. 

posterity

noun
  • All the future generations, especially the descendants of a specific person. 

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