Stage 4 lung cancer - long wait

Hello,
I have not Hebrew fonts, but you can reply in Hebrew.
Thank you very much in advance
How long does it usually take for the lung cancer to progress from Stage1/2 to Stage 4?
My father was referred to a hospital about 3 months ago. Everything takes a lot of time. He was waiting for the first biopsy results for 2 weeks (came negative), for the second one for 3 weeks (coincided with the strike), was told that he only has a small tumor which could be operated ,then waited a couple of weeks for the Pet Scan results – has mets in kidneys and bones. Now he’s been waiting for 2 weeks for an appointment with an oncologist , don’t know how long will he have to wait for the chemo if needed. Is this normal?