rǒng​yú

superfluous

冗余 (冗餘) rǒng​yú
superfluous adjective
being in excess of what is needed, or repetitive in a wasteful or unnecessary way
technical redundancy adjective
the inclusion of extra components or data to provide backup and ensure system reliability

Frequency

Movie subtitles
0.060 per million appears in 0% of films
Written text
0.805 per million

Sources

Definitions
CC-CEDICT