semantics vs semasiology

semantics

noun
  • A branch of linguistics studying the meaning of words. 

  • The individual meanings of words, as opposed to the overall meaning of a passage. 

  • The meaning of computer language constructs, in contrast to their form or syntax. 

  • The study of the relationship between words and their meanings. 

semasiology

noun
  • Semantics; a discipline within linguistics concerned with the meaning of a word independent of its phonetic expression. 

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