cnt_steal_def_action_fold and cnt_steal_def_opp are columns, you can look them up the same way you did the stat, just search under the columns tab. I’m not at my computer so I can’t look myself, but you will find the formula for those columns which should help you understand them better. The one to look at is cnt_steal_def_opp, which will defines the scenario faced. cnt_steal_def_action_fold Just counts how many times a player folded when faced with the scenario.
The statistics used in the columns can be looked up in the PT4db_schema. I’m sure you can find a copy with a quick internet search.
A steal opportunity Is recorded by stat ‘flg_steal_opp’ and is defined as: “ If the player was in stealing position and had the opportunity to steal the blinds, this is set to true, otherwise it is false. To have the opportunity to steal the blinds, the pot cannot be opened yet.”
Another useful definition is for fold to steal in SB, flg_sb_steal_fold, “ If someone who is in stealing position attempted to steal and the player was in the small blind and folded, this is set to true, otherwise it is false. Stealing positions are Cut Off, Button and Small Blind only. To face a steal everyone else must fold between the steal raise and the player facing the raise.”
Hope that helps for now. If you need more info I can help further when I have access to my computer.