from what I understand, writing multiple articles around one keyword can cause google to rank what it thinks is more relevant, and this is assuming, each article is similar in nature, which it should not be... ie: Best Red Car in Town Best Red Car in 2016 Best Parts For Red Car In Town As you can see, each article would most likely be different, not about the same "red car..." how many articles do you write around each keyword... (assuming the content is different from the next...)
hello it depends on you how many u wants to write. but each content should be unique and must need to use LSI keyword. its better not to use yr main keyword again n again. its nt seo friendly. u need to change red car and use LSI of it. each keyword need to contain at least 5 to 10 unique content and with unique image. thank u