This is the 5773rd most frequent Japanese word.
なにぶん
"なにぶん" means "after all," "anyway," or "to some extent."
In this sentence, なにぶん emphasizes the limited nature of the time available, showing the speaker's recognition of the situation.
なにぶんお時間がありませんので、結論から話します。
Since time is limited, I will start with the conclusion.
Here, なにぶん conveys a plea for understanding due to the speaker's unfamiliarity with the situation.
なにぶん初めての経験ですので、不手際があるかもしれません。
Since this is my first experience, there might be some slip-ups.
In this case, なにぶん is used formally to seek cooperation or understanding, expressing politeness and humility.