a little vs only too

a little

adv

  • Very. 

  • A lot. 

  • Slightly. 

  • A lot of. 

  • To a small extent or degree. 

det

  • A small amount of. 

only too

adv

  • very, all too. 

  • to a high degree; very well or very much 

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