If i do not throw up in any particular routine, just occasionally a few times a day, will it affect my teeth?

Yes: Yes, the stomach contacts can affect your enamel, due to extremely acidic liquids that very slowly and incrementally erode the enamal behind your teeth. It's very important not to brush your teeth for 20 mins after vomiting, because the softened enamel can be brushed away, and once enamel is gone, it's gone forever. It's best to just rinse your mouth with water. See pcp to find cause of this.

Throwing up: If you are throwing up every day, regardless of why, you are doing damage to your teeth. The acid from your stomach is quite powerful and will gradually dissolve the teeth. Speak with your physician about this right away, learn why you are throwing up, get it fixed and have your damaged teeth repaired as needed. You are also doing damage to your esophagus, throat and mouth as well.

Absolutely!: Each time you throw up it adversely affects your teeth and the damage is cumulative over time. It's like asking 'if i chew sticky sugary snacks and only brush my teeth some days & at different times of the day each time, is that bad?' the answer to both questions is yes. You should be under the care of a physician for your problem and seek advice from your own dentist on how to minimize the damage.