To activate the cooldown requires 2 options, you have to add: "use-cooldown" to true and "cooldown" with the desired time (time in seconds).
bows:
cooldown-bow:
display-name: "&b&lCooldown Bow!"
lore:
- "&7Made with <3 by josielcm#8990"
use-cooldown: true # Default true
cooldown: 3 # Time in seconds
Cooldown message
To add a custom cooldown message you can use the option: "cooldown-message", if you wish you can use the variable "timeleft" to give the remaining time to use the bow again.
bows:
cooldown-bow:
display-name: "&b&lCooldown Bow!"
lore:
- "&7Made with <3 by josielcm#8990"
use-cooldown: true # Default true
cooldown: 3 # Time in seconds
cooldown-message: "&5Magic Bows &7: &7You must wait &6%timeleft% &7seconds before using this bow again."