lighten vs ruddle

lighten

verb
  • To become light or lighter in weight. 

  • To become brighter or clearer; to brighten. 

  • To make less serious or more cheerful. 

  • To illuminate with knowledge; to enlighten. 

  • To descend; to light. 

  • To emit or disclose in, or as if in, lightning; to flash out, like lightning. 

  • To alleviate; to reduce the burden of. 

  • To become less serious or more cheerful. 

  • To make brighter or clearer; to illuminate. 

  • To make light or lighter in weight. 

ruddle

noun
  • A form of red ochre sometimes used to mark sheep. 

  • A riddle or sieve. 

verb
  • To mark something with red ochre. 

  • To raddle or twist. 

  • To sift together; to mix, as through a sieve. 

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