head-on vs wide open

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. 

wide open

adj
  • unsettled or unresolved 

  • vulnerable or unprotected 

  • of the situation at the beginning of trading when there is a large spread between bid and ask prices 

  • having no laws or law enforcement 

  • completely open 

  • without the presence of opponents nearby 

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