What is the working time in this profession?

The time spent working in this major refers to the total time spent working in the major you are applying for in your work experience. If you apply to be an inspector, the time you have spent working in this profession is the total time you have spent doing inspection work in the past. If you apply for a forklift driver job, the time you have spent working in this profession is the total time you have spent driving a forklift in the past.