Jehovah vs Jehovah's Witness

Jehovah

noun

  • A Jehovah's Witness. 

name

  • The personal name of God in the Hebrew Scriptures; in Hebrew, יהוה (YHVH) 

Jehovah's Witness

noun

  • A member of the Christian church Jehovah's Witnesses. 

How often have the words Jehovah and Jehovah's Witness occurred in a corpus of books? (source: Google Ngram Viewer )