Duplicate multiple columns at once

I have a situation where I need to have 14 different informations that repeat 5 times in a board - for example, I need 5 names, 5 birthdays, etc etc etc. To do so I either create each of these 14x5 columns individually or I duplicate each column 5 times, 14 times and rearange it all manually. I’ve been doing this for over an hour and am far from being done.

I tried to build the structure on an excel file and import, but when importing I can only have a text or status column. If I have a file, data, number or anything different it doesn’t work, and then again I have to change it manually again.

Being able to duplicate multiple columns would be a HUGE time saver!