abrupt vs head-on

abrupt

adj
  • Without notice to prepare the mind for the event; sudden; hasty; unceremonious. 

  • Curt in manner. 

  • Suddenly terminating, as if cut off; truncate. 

  • Having sudden transitions from one subject or state to another; unconnected; disjointed. 

  • Extremely steep or craggy as if broken up; precipitous. 

verb
  • To interrupt suddenly. 

noun
  • Something which is abrupt; an abyss. 

head-on

adj
  • Direct, abrupt, blunt or unequivocal; not prevaricating. 

  • Of a collision, from the front or in the direction of motion. 

noun
  • A collision from the front. 

adv
  • With the front of a vehicle. 

  • With direct confrontation. 

How often have the words abrupt and head-on occurred in a corpus of books? (source: Google Ngram Viewer )