I am filling out the DS-230 at the moment, and am stuck on the bit where you list all previous visits to the USA. I have a lot of visits, as I have friends there and of course visited my husband a lot when he was still my boyfriend and lived over there. Additionally, I worked for US based multi-nationals for several years and flew over for meetings. Many of these visits were only for a weekend, none for more than two weeks, and all were under the VWP. I am trying to re-construct all visits through passport stamps and emails, but I lost a passport many years ago (that was a Swiss passport, and I now always travel with my Irish one) and some stamps are illegible.

How big of a deal is it if I get some dates wrong by a few days/ miss one or two visits?