Please can you tell me what the difference is between a major service and a minor service on a Pajero (in my case my adored LSP - little silver princess - 2000 SWB Pajero 3.0 V6 petrol now with 410 000km

I bought my LSP secondhand many years ago and there was no manual with the vehicle. I service it every 10 000km and do the cam belt changes at 100k marks as recommended by Mitsubishi and Mitspro. Today I got to wondering about these things

Thanks
Janet