I don't know about other jobs, but I know in nursing you have to have worked at least 20 hours a week in the last 12 months in your particular job to qualify for applying for a skilled assessment for
PR status.
My ex colleague had wanted to come to WA, but instead had to look for state
PR sponshorship because she had only returned to work from Mat leave and had been off work for 12 months. In the end it worked out as she loves working in NSW.
I would check if your skill has any regulations regarding hours worked in the last year.
Ali