Nob vs Tribulation

Nob

name
  • A place, north of Jerusalem, where the inhabitants were massacred by Saul. 

Tribulation

name
  • (A period of) persecution before the Second Coming, lasting seven years, which Christians will experience worldwide which will purify and strengthen them. 

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