Special Edition version: http://www.nexusmods.com/skyrimspecialedition/mods/1366/?

This an old mod I've published on Steam Workshop (link) a while ago.
I uploaded it here once on another account and have since deleted it, so I decided to reupload it here again, if anyone wants to use it.

There are much better mods for dragon shouts nowadays like DragonFire - Tactically Enhanced Breath Shouts by NRVNQZR, or Improved Dragon Shouts by Ozram, (no idea if they work with SE, though) so you should probably use either of them, but if you need a super simple mod, this one's still here.

Original description:

This mod simply doubles the damage of Fire and Frost breath shouts and cuts their cooldowns to 10/20/30 to make them viable on higher levels.

Doesn't modify dragon versions of the shouts and is incompatible with any major overhaul that modifies any shouts. If you want to make a patch, go ahead, but be sure to message me so I can link it here.

Damages now:

Fire Breath: 100/140/180
Frost Breath: 20/28/36 per second for 5 seconds, also slows target as usual

Took 2 minutes to create and I don't offer any support for it anymore, do whatever you want with it.