deathwatch beetle vs moth

deathwatch beetle

noun
  • Any of various beetles of the family Anobiidae, especially Xestobium rufovillosum, that bore into wood and make a tapping sound. 

moth

noun
  • A usually nocturnal insect of the order Lepidoptera, distinguished from butterflies by feather-like antennae. 

  • Anything that gradually and silently eats, consumes, or wastes any other thing. 

  • The plant Vigna aconitifolia, moth bean. 

verb
  • To hunt for moths. 

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