I want to remove the cache value of ip address for every 10sec of TTL value. The following is my code,

// İSTEMCİNİN '/' İSTEĞİNE KARŞILIK VEREN KOD BLOĞU
app.get('/getIpAdress/:url', function (req, res) { 
  dns.resolve4(req.params.url, { 'ttl': true }, (err, address, family) => {
    if (err) {
      let obj = {
        ip: '',
        statusCode: 1,
        resp: 'Ip address not found',
        timeStamp: new Date()
      }
      res.status(200).json(obj);
      return;
    };
    sendResponse(address, res);
  });

  function sendResponse(address, res) {
    let obj = {
      url: req.params.url,
      ip: address,
      resp: 'Ip address found',
      statusCode: 0,
      timeStamp: new Date()
    }
    res.status(200).json(obj);
  }
});
}

The above code returns ip and ttl but i want the ip to be changed for every 10 secs.