insufficient vs some kind of

insufficient

det
  • A quantity (of something) that is less than is needed. 

  • An inadequate quantity of; not enough. 

adj
  • Not sufficient; lacking competent power or ability; unqualified, unequal, unfit. 

  • Not sufficient; of a type or kind that does not suffice, that does not satisfy requirements or needs. 

some kind of

det
  • a mediocre; a bare minimum; (denoting that something only barely fits a certain category, or is very mediocre in it) 

  • A remarkable. 

  • Used other than figuratively or idiomatically: see some, kind, of. 

adv
  • Used as an intensifier of adjectives: remarkably 

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