lighten vs overhang

lighten

verb
  • To alleviate; to reduce the burden of. 

  • 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 become less serious or more cheerful. 

  • To make brighter or clearer; to illuminate. 

  • To make light or lighter in weight. 

overhang

verb
  • To impend. 

  • To hang over (something). 

noun
  • A fatty roll of pubis flab that hangs over one's genitals; a FUPA. 

  • The volume that tips the balance between the demand and the supply toward demand lagging supply. 

  • Anything that overhangs or protrudes over its base, such as a wave immediately before breaking, or a protruding cliff or rock wall. 

  • That portion of the roof structure that extends beyond the exterior walls of a building. 

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