Dictionary / Vocabulary / 多分に
たぶんに
in great amount; considerably; substantially; quite
高度に専門的な話題で、多分に誤った情報が含まれる可能性があることはあらかじめお断りしておきます。
Because this is such a highly technical subject, I would like to point out in advance the likelihood that some of what I'm about to say may include information that is incorrect.