Retirement tax questions

I need to enter the "unrecovered contributions" for my husbands personal IRA.  I have come to understand this is the total amount that we contributed over the lifetime.  This IRA is not work related.  However, it seems any information I find to assist me in determining exactly what an unrecovered contribution is always refers to a Roth IRA, not a traditional IRA - which we have. Does someone know if it doesn't matter what kind of IRA and am I correct in what an unrecovered contribution is?   Thank you to any help you can give.