What does it mean to know a word?
Frequency How common is the word? (R)
How often should it be used? (P)
Appropriateness Where would we expect this word to be used? (R)
Where can this word be used? (P)
Concept What does the word mean? (R)
What word should be used to express this meaning? (P)
Associations What other words does this word make us think of? (R)
What other words should we use instead of this one?(P)