cancroid vs squamous cell carcinoma

cancroid

noun

  • Squamous cell carcinoma 

  • Any disease that resembles cancer 

adj

  • Of or pertaining to cancer, especially to squamous cell carcinoma 

  • Resembling a crab 

squamous cell carcinoma

How often have the words cancroid and squamous cell carcinoma occurred in a corpus of books? (source: Google Ngram Viewer )