Article writing job for SEO

We will need some articles with specifications like below for SEO with certain keywords 1.)We need 8 articles each article should have at least 500 words 2,)We will send keywords and need them repeat %2-4 consistency in articles as italic or Bold 3.)Not a copy of web articles will be accepted. 4.)Its a medication item to describe it in different way than other websites and its easy to do. 5.)For each article we can offer max 4$ according your service quality. We will have long term business if you have an instant communication ways. Thanks!