If the form allows, perhaps a "not listed" option that would then show a follow-up question with a text box where people could suggest additional entries.
You wouldn't have to aggregate all the custom entries if it was too onerous, but if you spotted a pattern/some frequently entered things you could then include them next time.
If the form allows, perhaps a "not listed" option that would then show a follow-up question with a text box where people could suggest additional entries.
You wouldn't have to aggregate all the custom entries if it was too onerous, but if you spotted a pattern/some frequently entered things you could then include them next time.