Where does the word "OCHE" originate?

Have you ever asked yourself that question? Well no. I had not given it much thought until I stumbled across this....
Oche: Its derivation is obscure but my best guess is that it derives from the word 'hocken' an old English word, utilised more in the North of the country than anywhere else. The word means 'to spit.' Given that darts was originally played in the public bar or vault where the floor was covered in sand and the room liberally furnished with spittoons, my theory is that the ‘hockey’ line was determined by the length that a given player could spit from a position with his back to the dartboard.