How can I determine the words occurring 10 times or more in the NT?
Run a concordance on your desired Greek text then set the word count option for display.
Can you show this being done visually?
Notice in this first image that the count is from 1 to 19836.
While in this second image the count is from 10 to 19836.
The number of Greek words that make up the NT Bible Text is 5428 in the first image and 1134 in the second.