The probe that led to prostitution charges against New England Patriots owner Robert Kraft targeted five South Florida massage parlors where women lived like slaves — and serviced an average of eight clients a day, according to authorities.

“If you do the math, that is about 1,500 men a year, with no days off,” Martin County Sheriff William Snyder said.

Snyder said the women also had to endure grueling living conditions as part of their employment, according to a report by WPTV.

“They were cooking on the back steps of the business,” he said.

“These women were sleeping in massage parlors, on the massage tables and had no access to transportation.”

During his Tuesday news conference, Snyder said about 100 men would be busted on charges of soliciting sex as part of an eight-month investigation.

He also promised, “There will be a newsmaker in this one” — leading to Friday’s revelation that Kraft was among the alleged johns.

Through a spokesperson, Kraft denies engaging “in any illegal activities.”

Three Florida women have been arrested on charges tied to the operation of the massage parlors, according to reports.

They’re identified as Hua Zhang, 58, of Winter Garden; Rumei Li, 48, of Jupiter; and Lixia Zhu, 48, of Stuart.

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