The phrase "year experience" refers to the amount of time someone has spent doing something or working in a specific field for a whole year. Full definition
He has 10 + years experience in retail and B2B sales, marketing and business development, and 20 + years in startup, early stage and growth company management. (greenbusinessnetworking.org)
I have 10 + years experience as a project manager. (inc.com)
Registered Nurse with 3 + years experience in providing nursing care to diverse populations in psychiatric and medical - surgical settings. (livecareer.com)