Longman Dictionary of Contemporary English
job-sharing
noun
EXAMPLES FROM CORPUS
▪ A job-sharing policy should be devised in conjunction with staff organisations.
▪ Full-time staff are being asked if they would like to switch to part-time work and various initiatives including job-sharing are being encouraged.
▪ In either instance the posts suitable for job-sharing should be identified.
▪ Posts which can not be filled should be considered as to their suitability for a job-sharing arrangement.
Wiktionary
job-sharing
n. An arrangement whereby multiple people are employed on a part-time basis to perform a job normally available to one working full-time; remuneration being apportioned between them