Occupation – The work that makes up most of your time and is typically identified by job title.
She is a math teacher.

Career – the totality of your life’s work, including family, learning and leisure.
She has three children, is a competitive swimmer, reads mystery novels and has worked in politics for 20 years.

Work – A conscious effort to produce societally acceptable benefits for yourself and others. Says Hoyt, “It represents the human need to do, to achieve, to be someone and to know it makes a difference that you exist.?
He spent the afternoon working in the garden.

 J ob – A specific duty or responsibility you perform on a regular basis, which can be paid or unpaid. It also refers to position status within an organization.
He has a job as a reference librarian at the city library.