mid vs middle

mid

adj
  • Denoting the middle part. 

  • Made with a somewhat elevated position of some certain part of the tongue, in relation to the palate; midway between the high and the low; said of certain vowel sounds, such as, [e o ɛ ɔ]. 

  • Trashy; low-quality. 

  • Of mediocre quality. 

  • Of marijuana, midgrade. 

  • Occupying a middle position; middle. 

prep
  • Amid. 

  • With. 

noun
  • A mid-range. 

middle

adj
  • Located in the middle; in between. 

  • Pertaining to the middle voice. 

  • Central. 

noun
  • A centre, midpoint. 

  • The part between the beginning and the end. 

  • The middle stump. 

  • The central part of a human body; the waist. 

  • The middle voice. 

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