What is the meaning of "excellent things" in Proverbs 22:20

>Have not I written to thee **excellent things** in counsels and knowledge, that I might make thee know the certainty of the words of truth... -- Proverbs 22:20 (KJV) In the KJV of this verse, the Hebrew word 'Shalosh' is translated as "excellent things.' However, most other translations, as well as Strong's Concordance, defines that Hebrew word as "a threefold measure, a triple." This seems to give the verse the meaning: "Have not I written to thee a threefold measure in counsels and knowledge. So, what is this threefold measure, or triple?