What is the chance of getting the 8 in minesweeper?

Using Python to generate a huge number of boards to figure out how rare actually are those 8s?

NOTE: Calculation and simulation for beginner game done for 8x8 board. For 9x9 is it about 5 times less likely.

Source code of the simulation: https://drive.google.com/open?id=1onG...

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