lant vs launce

lant

noun
  • Any of several species of slender marine fishes of the genus Ammodytes, including the common European species (Ammodytes tobianus) and the American species (Ammodytes americanus). 

  • Aged urine. 

launce

noun
  • sand eel, sand lance, fish of the family Ammodytidae 

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