few vs some

few

det
  • Not many; a small (in comparison with another number stated or implied) but somewhat indefinite number of. 

  • Obscuring one to two oktas (eighths) of the sky. 

  • There are a few cars (=some, but a relatively small number) in the street. 

  • An indefinite, but usually small, number of. 

  • (US?) Having a 10 percent chance of measurable precipitation (0.01 inch); used interchangeably with isolated. 

pron
  • Few people, few things. 

some

det
  • An unspecified quantity or number of. 

  • An unspecified amount of (something uncountable). 

  • A certain, an unspecified or unknown. 

  • A considerable quantity or number of. 

  • approximately, about (with a number). 

  • A certain proportion of, at least two. 

  • A remarkable. 

adv
  • Of a measurement: approximately, roughly. 

  • To a certain extent, or for a certain period. 

pron
  • An indefinite quantity. 

  • An indefinite amount, a part. 

  • A certain number, at least two. 

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