The briefs are pretty important because they are the top 1000 words that are most commonly briefed, so if you have them, you have the ones that you will use the most.
The words, though, are more important. They show up more than the briefs. If you learn the top 1000 words first, you will also learn the most popular briefs. Then when you work on the Top 1000 briefs, you will already have the most important ones.
So we gave it the name that we thought would catch your eye: The Top 1000 Briefs and the Top 1000 Words.
But the words are more important.