occurence unsorted array in binary search

let arr = [2,3,4,6,7,2,1,2,990]
n=arr.length-1;
s=2
function occurence(arr){
let count = 0
for(i=0;i<=n;i++){
if(arr[i]===s){
count = count + 1;
}
}
return count;
}

let result = occurence(arr);
console.log( array [${arr}])
if(result == 0){
console.log(here is value not found)
}
else{
console.log(value [${s}] is repeating [${result}] times)
}