a bit vs all of

a bit

adv
  • Slightly; rather. 

  • To a small extent; in a small amount. 

  • Very. 

  • A lot. 

all of

adv
  • Merely; only; no more or less than; neither more nor better than might be expected. 

  • Entirely, completely, in a specified state. 

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