Steps to Reproduce
1. In Creative Mode Or Survival place an Enchanting Table on the Ground and Leave the Enchanting Table at level 30
2. See the Enchantments. Most often the same enchantments appear one after another
3.Get any sword. The Enchantments that appear with Frequency are Bane of Arthropods, Looting, Unbreaking, Smite And Fire Aspect
Comments 4
Some enchantments are supposed to be more common than others, and some are exclusive to certain tools. Please see the wiki page on enchanting for more info. Resolving this issue as works as intended.
The reason for this is that these enchantments were created specifically for the sword. The same thing happened to me and I realized that when I tried a different tool. Try switching tools to see if that helps