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~~~ function countStr (str,strSplit){ return str.split(strSplit).length-1 } var strTest='sad44654blog5a1sd67as9dablog4s5d16zxc4sdweasjkblogwqepaskdkblogahseiuadbhjcibloguyeajzxkcabloguyiwezxc967' ​ countStr(strTest,'blog') // 6 ~~~