offhand vs unselective

offhand

adj
  • Careless; without sufficient thought or consideration. 

  • Without planning or thinking ahead. 

  • Curt, abrupt, unfriendly. 

adv
  • Right away, immediately, without thinking about it. 

  • In an offhand (adjective) manner. 

unselective

adj
  • Not selective; open and inclusive 

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