No one publishjes this, so you need to work to find an approximation
Check reviews on Amazon and NewwEgg, compare the % favorable to other Seagate spinning drives and to Hitachi drives. Look at the blackblaze failure rates for various seagate drives and guess which platters are similar to the SSHD drive. https://www.backblaze.com/blog/hard-drive-reliability-q4-2015/
https://www.backblaze.com/blog/hard-drive-failure-rates-q2-2016/
I am using a seagate hybrid drive in one system, it works fine for me. I likely would not buy again vs. just getting a 250GB or 500GB SSD and (if needed) a large spinning data drive. Price of 500gb and smaller SSDs is $150 or less.