etymon vs philology

etymon

noun
  • Meaning as derived and conveyed thereby: The literal meaning of a term according to its origin, which may differ from its usual meaning when the latter relies on idiomatic conventions that are not conveyed by the term alone (that is, they must be known in other ways, such as experience, training, education, or dictionary lookup). 

  • The original or earlier form of an inherited or borrowed word, affix, or morpheme either from an earlier period in a language's development, from an ancestral language, or from a foreign language. 

philology

noun
  • Linguistics. 

  • The humanistic study of language. 

  • Love and study of learning and literature, broadly speaking. 

  • Scholarship and culture, particularly classical, literary and linguistic. 

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