frightful vs lucky

frightful

adj
  • Unpleasant, dreadful, awful (also used as an intensifier). 

  • Genuinely horrific, awful, or alarming. 

adv
  • Frightfully; very. 

lucky

adj
  • Favoured by luck; fortunate; having good success or good fortune. 

  • Producing, or resulting in, good fortune 

noun
  • seven 

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