I have a question about NHL data as well.
I am curious of the push frequencies in Regulation Time for 2-2 and 3-3. (If possible as a function of total line but I belive that it doesnt matter all that much. I also relize that it is influenced by how even the teams are, if anyone got any idea of how big this effect is then feel free to contribute

)
I calculated these push frequencies to:
2-2~ 6,5% (for total line around 5-5,5)
3-3~ 5% (for total line around 5,5-6,5
for even teams using poission.
Can anyone tell me how well this correlates to reality?
