function searchForANumber(arr, command){

let counter = 0
let index=command[0]
let specialNumber = command[2]
let removeNumber = command[1]

let newArr = arr.splice(0,index)
newArr = newArr.slice(removeNumber) // removeNumber, newArr.length -
                                    //е варианта с граница до края на масива
for(let el of newArr){
    if(specialNumber === el){
        counter++
    }
}
console.log(`Number ${specialNumber} occurs ${counter} times.`)

}