Question about GPU thermal cycling

[VibeChecker]

I was wondering how much thermal cycling (repeated heating up and cooling down) shortens the lifespan of a modern GPU.

I ran furmark about 12-15 times in total across the span of 3 days when I was doing some testing. Most of those runs were 1 minute long and some of them were about 5 minutes long. I thought it would be better to run it multiple times for shorter amounts of times than running just a few times but for a longer time every time because I would prevent overheating, but later I realised thermal cycling could have affected it so I want to know if there is any way I could have damaged anything.

The max temperature during the benchmarks was 73 degrees celcius and the idle temperature is 35-40 degrees celcius so that's about a 40 degree celcius difference that happened about 5 times per day, accross the span of 3 days. My GPU is a zotac rtx 2070 mini.