Hi, Brandon,
When I do this search ("sir @g2962" w/o the quotes), I only get one hit: Mt 21:30.
But, when I use the English-Strong's indexer, I get a lot more hits where κυριος is translated as "sir" in the KJV.
I did the same thing with "master @g2962", and only got 2 hits. But the ESI got...