YOU SAID:
I've been quite busy.
INTO JAPANESE
かなり忙しかったです。
BACK INTO ENGLISH
It was quite busy.
INTO JAPANESE
とても忙しかったです。
BACK INTO ENGLISH
It was very busy.
INTO JAPANESE
とても忙しかったです。
BACK INTO ENGLISH
It was very busy.
That didn't even make that much sense in English.