If I take one frozen chicken breast out of freezer... How long will it take to defrost
A long time in the fridge. If you need it faster & it is well sealed in plastic, you can do the water bath method (submerge in cold water.) Even then it'll take an hour or so.
We defrost things in plastic bags submerged in a bowl/container (Whatever is handy.) of cool water. Things defrost fairly quickly. One chicken breast should not take an hour.