Heathen vs idolatry

Heathen

noun

  • An adherent of the Germanic neo-pagan faith of Heathenry. 

adj

  • Pertaining or adhering to the Germanic neo-pagan faith Heathenry. 

idolatry

noun

  • The worship of idols. 

  • The excessive admiration of somebody or something. 

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