For a beginner:
- Where are bishops mostly exchanged or placed?
- Where are knights mostly exchanged or placed?
The f3/f6/c3/c6 tend to be where most knights are exchanged. That is because in beginner play, if the opponent tries to push the pin with h3/h6/a3/a6, the person who has pinned the knight with the bishop typically exchanges, and this tends to be a beginner fault..