How Many Exercises Should You Be Performing Per Body Part?

To give you an idea of how many exercises you should be doing per body part, I am currently performing

2 exercises for calves
2-3 for quads
2-3 for hamstrings and / or glutes

4-5 for back
1-2 for lower back

3-4 for chest
3 for biceps
3 for triceps

2 for posterior delts
2 for medial delts
1 for anterior delts
and 1 for traps

Using low frequency, meaning that I only hit those muscle groups once a week and 3 sets per body part, 2 warmup sets and one working set (with certain exercises e.g., the squat, deadlift, bench press and / or incline bench press 3-4 warmup sets, BB rows (heavy compound movements).).