bethel vs pilgrimage

bethel

noun
  • A holy place. 

  • A chapel, especially one for sailors, converted from an old ship. 

pilgrimage

noun
  • A journey made to a sacred place, or a religious journey. 

  • A visit to any site revered or associated with a meaningful event. 

verb
  • To go on a pilgrimage. 

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