Apart from primary,secondary and tertiary occupations certain occupations need special skills these are included in quaternary occupations. e.g.doctors,lawyers,teachers,etc.
A person's occupation is the work they do to earn their living. For example: taxi driver, reporter, musician, doctor, lifeguard, sales person, cashier, etc.
An occupation means job/work or what you do for a living. If you are asking what it means, there you go. If you are asking for an example of one, then: Vet, singer, dancer, artist, author, nurse,...
