slackness
2 occurrences across the corpus
King James Version
2 Peter 3:9
The Lord is not slack concerning his promise, as some men count slackness; but is longsuffering to us-ward, not willing that any should perish, but that all should come to repentance.
KJV Apocrypha (Eastern Orthodox Additions)
2 Esdras 5:42
And he said unto me, I will liken my judgment unto a ring: like as there is no slackness of the last, even so there is no swiftness of the first.