naval vs thalassoid

naval

adj

  • Of or relating to a navy. 

  • Of or relating to ships in general. 

thalassoid

adj

  • Synonym of marine 

noun

  • Any small lunar "sea" 

  • Any moth of the genus Thalassodes 

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