構文: FIND(find_text、within_text[start_num]) FINDB(find_text、within_text[start_num])

https://support.microsoft.com/ja-jp/office/find-%E9%96%A2%E6%95%B0-findb-%E9%96%A2%E6%95%B0-c7912941-af2a-4bdf-a553-d0d89b0a0628