EasyTransfer sendData() time problem, help me please

I am trying to use EasyTransfer library to send a struct with UART, and sendData() function has a timer itself, it works in every 1000 ms , i need to change this to a lower value but i couldn't find the way to change it to something else. Can you help me with this, i would be very happy.
Link of the library

This is the Transmitter code, and when i get values on the receiver, values are like this
2, 4, 6, 8, 10 so as i understand sendData() function has a timer that makes it work in every 1000ms, i hope i explained the situation, sorry for my english, thanks.

int a ;
struct SEND_DATA_STRUCTURE{
  //put your variable definitions here for the data you want to send
  //THIS MUST BE EXACTLY THE SAME ON THE OTHER ARDUINO
  int16_t blinks;
  int16_t pause;
};
//give a name to the group of data
SEND_DATA_STRUCTURE mydata;

void setup(){
  Serial.begin(9600);
  //start the library, pass in the data details and the name of the serial port. Can be Serial, Serial1, Serial2, etc. 
  ET.begin(details(mydata), &Serial);
  
}
void loop(){
  a++
  ET.sendData();
  delay(500);
  }

Please post ALL your code not just the bit that you think contains the error. We need to be able to compile the code ourselves to see what is wrong.

If you knew where the error was then you wouldn't be asking questions.