entombment vs planting

entombment

noun
  • The act of entombing or the state of being entombed 

  • The decommissioning of a radioactive site by encasing it in concrete 

planting

noun
  • The act of setting a plant in the ground for growth. 

  • A plantation. 

  • A plant (or clipping) that has been freshly planted. 

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