police work
— Noun
– English
～ the investigation of criminal activities
piece of work
— Noun
– English
～ a product produced or accomplished through the effort or activity or agency of a person or thing; "it is not regarded as one of his more memorable works"; "the symphony was hailed as an ingenious work"; "he was indebted to the pioneering work of John Dewey"; "the work of an active imagination"; "erosion is the work of wind or water over time"
put to work
— Verb
– English
～ cause to work; "he is working his servants hard"