Two different content for a single keyword

[frontierinternet]

I hope the title explains it. A single keyword which is a rare one should or can have two different content. I know it sounds odd but its true. So, here is my query that if I build two content pages then how can I get index and ranked just one. Its not debatable that whether or not I  build only single page. "I have to build two pages."

You can build two pages for a single keyword but with the unique content and different URL.