There is no set number of times to top or LST.
You can top dozens of times if you want, though I wouldn't recommend that for an indica. The idea generally speaking is to flatten out your plant(s) canopy so that it grows laterally.
So tie down new growth tips that are higher, tie to the side fan leaves that are blocking light from reaching a lower growth tip. Just try and make things flat, but there is no correct way to LST or top.
Just use your own discretion, maybe take it easy on training too much if this is your first time and in subsequent grows you will learn when and what to LST or not. You can top several times if you want but if you are a new grower I wouldn't recommend it, top once and learn how that alters your plants growth and then in the future you can just apply the technique as you see fit. No right or wrong way.