Bethenny Frankel might no longer be a Real Housewife, but it looks like she still remains as one of the most influential and successful former cast mates of the hit Bravo franchise.

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While the Real Housewives of New York's Carole Radziwill and Aviva Drescher have both tried their hand at publishing new advice books, neither one could match the success that Frankel's books have had in sales.

Frankel's Naturally Thin: Unleash Your SkinnyGirl and Free Yourself from a Lifetime of Dieting, has sold more than 200,000 copies in print since 2009. In comparison, Radziwill's The Widow's Guide to Sex & Dating sold only 7,400 copes while Drescher's book, Leggy Blonde did even worse by only selling 2,100 copies in total.

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As far as other popular Real Housewives books, no one has been able to match Frankel's success, with the Real Housewives of New Jersey's Teresa Giudice selling 40,000 copies of her Fabulicious cookbook while the Real Housewives of Beverly Hills' Brandi Glanville's Drinking and Tweeting was a surprise bestseller with a sale of 26,000 copies last year.

Meanwhile, it seems as though Frankel is giving her Real Housewives friends a little advice by "coaching" them on how to successfully come out on top during their reunion specials.

Frankel has supposedly coached Aviva Drescher and helped give her tips to stay ahead of the game during the Real Housewives of New York reunion show.

"A lot of the ladies have coaches before they tape the reunion show. However, this season Aviva turned to the master herself, Bethenny Frankel," a source tells Naughty but Nice Rob. "Aviva did a great job at the reunion. Reminding Heather that she was not from 'the hood,' saying, 'Holla my ass.' She was also taught a reunion trick, stay silent while the other ladies attach each other."

Frankel's daytime talk show, Bethenny, was canceled last month after only one season on the air.

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