Heathen vs plebs

Heathen

noun

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

adj

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

plebs

noun

  • The plebeian class of Ancient Rome. 

  • The common people, especially (derogatory) the mob. 

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