Trident and crossbow enchantments are too common

The following tests are books enchanted with level 30.

Original Test with 200 books:

• 15x Loyalty III (7.5%)
• 9x Impaling IV (4.5%)
• 5x Impaling V (2.5%)
• 3x Channeling (1.5%)
• 1x Riptide III (0.5%)

Total: 33 Trident enchants (16.5%)

Test in 1.15.1 with over 12K books using a loot table: See attachment.

Knowing that the Trident is a treasure item, these seem way to common. The crossbow enchantments are also specific, in comparison to efficiency and unbreaking. Enchantments that are used on more items should be more common.