mighty vs only too

mighty

adv
  • Very; to a high degree. 

adj
  • Excellent, extremely good. 

  • Very strong; possessing might. 

  • Very heavy and powerful. 

  • Accomplished by might; hence, extraordinary; wonderful. 

  • Very large; hefty. 

only too

adv
  • to a high degree; very well or very much 

  • very, all too. 

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