3-4 point low approach two-space low pincer, tenuki
If White ignores Black's pincer here, Black can continue with a or b. There are not many examples in contemporary pro games: but the variations are interesting.
When is played, White has answers at a, b and c. The wedge at a depends on a good ladder for White, otherwise Black at c may be strong.
This line is seen in Edo period games. The hanging connection to the second line of is typical good shape. The plays and are interesting: once White has the answer , rather than d, she stops worrying about cutting at the circled point. In the corresponding line for the one-space pincer, White is recommended to play at e, rather than the atari , accepting gote rather than give Black a thick outside position.
This is the third way to play, Black building a wall with an obvious gap.