Jehovah vs Jehovian

Jehovah

noun

  • A Jehovah's Witness. 

name

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

Jehovian

noun

  • A Jehovah's Witness. 

adj

  • Of or relating to Jehovah. 

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