aloof vs middle-of-road

aloof

adj
  • Reserved and remote; either physically or emotionally distant; standoffish. 

adv
  • At or from a distance, but within view, or at a small distance; apart; away. 

  • Without sympathy; unfavorably. 

middle-of-road

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