We look at the division of 458638 by 579 
The aim is to understand the frequency of 579 in 458638.

Going ahead to step 1:
If we divide 4 by 579, we get 0 and a remainder of 4.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 4 leaves us with 4.
Grab the next digit (5) from the dividend, add it to 4, then carry on: 45 / 579

On to step 2:
If we divide 45 by 579, we get 0 and a remainder of 45.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 45 and we're left with 45.
Grab the next digit (8) from the dividend, add it to 45, then carry on: 458 / 579

Going ahead to step 3:
458 divided by 579 is 0 with a remainder of 458.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 458, we get 458.
Bring next digit (6) of the dividend behind the 458 and repeat the process: 4586 / 579

Step 4:
The number 579 fits into 4586 7 times, leaving a remainder of 533.
Write down 7 as next digit of the result. 
Result so far: 7.0
If we take 4053 away from 4586, we end up with 533.
Grab the next digit (3) from the dividend, add it to 533, then carry on: 5333 / 579

Advancing to step 5:
If we divide 5333 by 579, we get 9 and a remainder of 122.
Write down 9 as next digit of the result. 
Result so far: 79.0
If we take 5211 away from 5333, we end up with 122.
Append the next digit (8) from the dividend to 122 and continue with: 1228 / 579

Let's proceed to step 6:
579 can be fit into 1228 2 times, resulting in a remainder of 70.
Put 2 as the next digit of the answer. 
Result so far: 792.0
The remainder is 70 after subtracting 1158 from 1228.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

Advancing to step 7:
When dividing 700 by 579, we get 1 with a remainder of 121.
The number 1 becomes the next digit in our result. 
Result so far: 792.1
The remainder is 121 after subtracting 579 from 700.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1210, and continue the process.

Moving on to step 8:
If we divide 1210 by 579, we get 2 and a remainder of 52.
The next digit of our result is 2. 
Result so far: 792.12
If we take 1158 away from 1210, we end up with 52.
Since there are no more digits in the dividend, we add a zero to the remainder making it 520, and continue the process.

Going ahead to step 9:
If we divide 520 by 579, we get 0 and a remainder of 520.
Write down 0 as next digit of the result. 
Result so far: 792.12
Deduct 0 from 520 and we're left with 520.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5200, and continue the process.

On to step 10:
The number 579 fits into 5200 8 times, leaving a remainder of 568.
Use 8 as the next digit of our solution. 
Result so far: 792.1208
If we take 4632 away from 5200, we end up with 568.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5680, and continue the process.

Let's proceed to step 11:
If we divide 5680 by 579, we get 9 and a remainder of 469.
Put 9 as the next digit of the answer. 
Result so far: 792.12089
Subtract 5211 from 5680 to get 469.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4690, and continue the process.

Going ahead to step 12:
If we divide 4690 by 579, we get 8 and a remainder of 58.
The next digit of our result is 8. 
Result so far: 792.120898
Deduct 4632 from 4690 and we're left with 58.
Since there are no more digits in the dividend, we add a zero to the remainder making it 580, and continue the process.

Going ahead to step 13:
580 divided by 579 is 1 with a remainder of 1.
Record the quotient 1 as the next digit in the result. 
Result so far: 792.1208981
Subtract 579 from 580 to get 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Advancing to step 14:
579 goes into 10 0 times with a remainder of 10.
The next digit of our result is 0. 
Result so far: 792.1208981
If we take 0 away from 10, we end up with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

After the division, we end up with 792.1208981 and a remainder of 1e-08.