Definition of LIC
PFR stands for "Preflop Raise". When you see PFR at a poker table, it will probably be in your HUD that comes with your tracker like PokerTracker 4 or Xeester. These 2 trackers always use the PFR shortcut. This is a statistic that is displayed by default in just about every HUD next to the VPIP (Voluntary Put Money Into Pot) statistic. The PFR or preflop raise is how often a player raises preflop. This number should be related to the VPIP. The preflop raise can be 2 big blinds, 3 big blinds, whatever. The preflop raise is opposed to the limp which is the action of simply paying the big blind without raising.
Relationship between the VPIP and the LIC
If a player has a VPIP of 50 and a PFR of 15, he is more likely to call than to raise. He's pretty passive. You know he's a recreational player who's not too aggressive. When he raises, he probably still has a good hand. On the other hand, if you see a player who has a VPIP of 21 and a LIC of 19, you know that he is a player who likes to have the initiative. The LIC is always best understood in conjunction with the IPPV.