dipstick vs loggerhead

dipstick

noun
  • A stick or rod used to measure the depth of a liquid. Often used to check the level at which a liquid in an opaque or inaccessible tank or reservoir stands; gauge. 

  • A penis. 

  • A useless person of inferior intellect; a dipshit. 

verb
  • To check (a person) for their understanding of something, as of a lesson, or attitude toward something. 

  • To measure the level of a fluid using a dipstick. 

loggerhead

noun
  • A metal tool consisting of a long rod with a bulbous end that is made hot in a fire, then plunged into some material (such as pitch or a liquid) to melt or heat it. 

  • The loggerhead duck or Falkland steamer duck (Tachyeres brachypterus; formerly Tachyeres cinereus), a species of steamer duck endemic to the Falkland Islands. 

  • The loggerhead kingbird (Tyrannus caudifasciatus), a bird endemic to the Caribbean and West Indies. 

  • The loggerhead sea turtle or loggerhead turtle (Caretta caretta), an oceanic turtle found throughout the world. 

  • A thistle-like flowering plant of the genus Centaurea, particularly the common knapweed (Centaurea nigra). 

  • The loggerhead musk turtle (Sternotherus minor), a large-headed turtle endemic to the United States. 

  • The loggerhead shrike (Lanius ludovicianus), a bird endemic to North America. 

  • The rufous-tailed flycatcher (Myiarchus validus), a bird endemic to Jamaica. 

  • A post on a whaling boat used to secure the harpoon rope. 

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