Heavenly Father vs YHWH

Heavenly Father

name
  • The Jewish or Christian God. 

YHWH

name
  • Known as the "Tetragrammaton", the four Hebrew letters יהוה which are transliterated into the Latin alphabet as YHWH (or IHVH, JHVH, or YHVH). Usually vowels are added to produce the spelling Jehovah, Yehovah or Yahweh (Jahaveh, Jahve, Jahveh, Jahweh, Yahve, Yahveh, Yahwe). 

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