Incorrect spelling


Incorrect spelling, explanation: the right form is created by using a verb come (to move from one place to another) and an ending -ing, so the form comming with double m is mistaken.

Correct spelling


Correct spelling, explanation: verb come + suffix -ing that creates adjective =coming, the only right version.

Definition of coming:
1. adjective, happening soon if something is coming it is expected.
I just hope the coming year will be better for me.
2. noun, approach
His coming to the party was a big sensation.

Idioms and phrases with coming:
coming or going, means being in a situation where you are confused and don’t know what to do next, especially when you are overwhelmed by too much work: She was so overwhelmed with duties that day, that by 1 P.M. she didn’t know if she is coming or going.
everything is coming up roses, we use this expression when everything in our life lines up to our expectations: OK, I may have a rough time in my life, but now, finally, everything is just coming up roses.
coming out of one’s ears – to have a great amount of something: Do you want a leaflet? Sorry, but I feel like they are coming out of my ears.