RichThesaurus
keep oneself to oneself
vs
regard oneself as unimportant
keep oneself to oneself
verb
To be introverted; to stay away from others.
regard oneself as unimportant
How often have the words
keep oneself to oneself
and
regard oneself as unimportant
occurred in a corpus of books?
(source:
Google Ngram Viewer
)