If you freelance, you do freelance work. She has freelanced as a writer and researcher. working independently for different companies rather than being employed by one particular company (free lance )
a writer or artist who sells services to different employers without a long-term contract with any of them working for yourself
Someone who does freelance work or who is, for example, a freelance journalist or photographer is not employed by one organization, but is paid for each piece of work they do by the organization they do it for. Michael Cross is a freelance journalist She had a baby and decided to go freelance. Freelance is also an adverb. He is now working freelance from his home in Hampshire