foggy vs overcast

foggy

adj
  • Obscured by mist or fog; unclear; hazy 

  • Being, covered with, or pertaining to fog (“tall grass etc that grows after, or is left after, cutting; moss”) 

  • Confused, befuddled, etc. 

overcast

adj
  • Covered with clouds; overshadowed; darkened; (meteorology) more than 90% covered by clouds. 

  • In a state of depression; gloomy; melancholy. 

noun
  • A cloud covering all of the sky from horizon to horizon; cloudy. 

verb
  • To fasten (sheets) by overcast stitching or by folding one edge over another. 

  • To make gloomy; to depress. 

  • To cover with cloud; to overshadow; to darken. 

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