Exemplo de Sleep com JavaScript

exemplo-sleep.js

let data = [1,2,3,4,5,6,7,8,9,10];
let factor = 2;

const sleep = async (ms) =>  {
    return new Promise(resolve => setTimeout(resolve, ms));
};

const start = async (data) => {
    let total =  data.length;
  
    for(let i = 0; i < total; i++) {
      
        if(i % factor == 0) {
           console.log(data[i]);
           await sleep(2000);
        }
    }    
    
}

start(data);