I'm not sure what you're asking. I do know that if you are going to use two different type faces in one document, it's best to make the distinctly different. That is, Baskerville and Times Roman are quite close in appearance and kerning. Readers who see both on one page will say, "Something doesn't look right." But if you pair or use Helvetica, a sans serif font, with Times Roman there can be no such mistake. Therefore, a reader won't think something is odd or "off" in some way but will recognize that there are two different styles. So use a sans serif font, maybe even in bold or extended for with Times Roman. Hope that's what you wanted to know.