RichThesaurus
be industrious/diligent/assiduous
vs
set to work
be industrious/diligent/assiduous
set to work
verb
To begin working.
To cause to begin working.
To begin working at.
How often have the words
be industrious/diligent/assiduous
and
set to work
occurred in a corpus of books?
(source:
Google Ngram Viewer
)