How often can you dye your hair per year without too much damage?

around how many times can you dye your hair throughout the year without it getting too damaged or too lifeless?
cause I do the roots about once a month and put colours in some parts of my hair around every month or two??
oh and I trim my hair about every 2 weeks or so..?

thanks

well you can always right a hair dye company.. but from my understanding.. putting chemicals such as dye into your hair..can cause minor damage.. and there are shampoos ect for coloured hair care .. if you notice damage. Sun age. hair gels Straigteners .. ect.. try finding a somthing for dry damaged hair.. some times if you look around on you can get free samples ect.. for your hair or advice.. just signed up to one.. and its been helpfull.. diffrent pesron's will say diffrent things..good its not.. depends of how your hair is now.. ? split ends? Trims are good.. ect.. good luck

I dye my hair every time my roots start coming in, and straighten it everyday. Its perfectly healthy. I just shampoo and condition it daily, and I leave the conditioner in for 10 minutes so my hair soaks up all the nutrients.

thanks!