mediopassive vs middle ground

mediopassive

noun

  • A mediopassive construction; a phrase that uses the mediopassive voice. 

adj

  • Pertaining to a voice of a transitive verb that is both middle voice and passive voice or reflexive and passive voice. 

middle ground

noun

  • A compromise position between extremes. 

  • The middle distance. 

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