Thanks to all

For example:
Farm A has 1000 Miner with 50TH per Miner.

Farmer B has only 1 Miner with 50 TH

Farmer A starts the machines. After a week he calculates the average (best-share) with all machines. M1+M2+M3…. :1000
Result = xxxxxxx

How can Farmer B xxxxxxx calculate, to check e.g. whether his miner is working properly?

Hit a Block or not is not the question.

Sorry for my bad english