Use time

Use Time is a statistic that applies to Weapons and other useable Items, which determines the time that must pass, after use, before the same item or another item can be used again. In basic terms, this is the "rate of fire", as measured in game frames (1/60th of a second). A lower use time means a faster weapon. The Shortswords, for example, have a Use Time of 11, meaning that they can be used in quick succession, as compared with the exceptionally slow Fiery Greatsword, which has a Use Time of 33 -- a much slower weapon that can not be used as often.

Here is a demonstration calculating fire rate. A Megashark has a use time of 7, meaning that it fires every 7 frames. Therefore, its fire rate, calculated by dividing the FPS by the weapons use time, is ~8.57 rounds per second, which adds up to ~514.3 rounds per minute. There are exceptions for certain items, for example the Health restoration items like Mushrooms and Lesser Healing Potions, which have a special cooldown period, or Flail and Boomerang weapons that must return before being fired again.

This statistic is particularly useful in comparing the speed of weapons. The in-game tooltips for these items automatically groups these values into categories like "Very Fast" or "Very Slow". These are grouped as following:

Modified Use Times
When a typical Modifier is applied to the weapon, "+10% speed" actually means "-10% use time", the modified value is rounded down and produces the new Use Time. Due to rounding the actual bonuses come in diverse percentages. The table below juxtaposes the rapidly firing Megashark and the much slower Musket.