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He played 17 games on the left wing scoring 6 and assisting 6. He did play 15 games as a striker though scoring 2 goals and getting 4 assists.
But he did play more games as a left winger so you are wrong there unfortunately.
Also using zaha playing as a striker in a Roy hodgson palace side is a bit silly. Seeing as he will be asked to have his back to goal and hold up the ball by having it knocked long to him. Which if you haven't seen him play is not playing to zaha's strengths.
The proof of this is when he played as a left winger he was directly involved in a goal 12 times in 17 matches. Right winger 1 goal in 2 games and second striker 1 goal in 2 games.