We look at the division of 21486944 by 586 
The aim is to understand the frequency of 586 in 21486944.

Advancing to step 1:
The number 586 fits into 2 0 times, leaving a remainder of 2.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 2 leaves us with 2.
Fetch the next digit (1) from the dividend, attach it to 2 and continue: 21 / 586

Moving on to step 2:
If we divide 21 by 586, we get 0 and a remainder of 21.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 21 after subtracting 0 from 21.
Append the next digit (4) from the dividend to 21 and continue with: 214 / 586

Step 3:
214 divided by 586 is 0 with a remainder of 214.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 214 and we're left with 214.
Include the next digit (8) from the dividend after 214, then repeat: 2148 / 586

Advancing to step 4:
586 can be fit into 2148 3 times, resulting in a remainder of 390.
Write down 3 as next digit of the result. 
Result so far: 3.0
Subtracting 1758 from 2148 leaves us with 390.
Take the next digit (6) from the dividend and append it to 390, then repeat: 3906 / 586

Moving on to step 5:
3906 divided by 586 is 6 with a remainder of 390.
Use 6 as the next digit of our solution. 
Result so far: 36.0
Deduct 3516 from 3906 and we're left with 390.
Fetch the next digit (9) from the dividend, attach it to 390 and continue: 3909 / 586

Going ahead to step 6:
3909 divided by 586 is 6 with a remainder of 393.
Use 6 as the next digit of our solution. 
Result so far: 366.0
Deduct 3516 from 3909 and we're left with 393.
Grab the next digit (4) from the dividend, add it to 393, then carry on: 3934 / 586

Let's proceed to step 7:
When dividing 3934 by 586, we get 6 with a remainder of 418.
The number 6 becomes the next digit in our result. 
Result so far: 3666.0
Subtracting 3516 from 3934 leaves us with 418.
Append the next digit (4) from the dividend to 418 and continue with: 4184 / 586

Moving on to step 8:
If we divide 4184 by 586, we get 7 and a remainder of 82.
Use 7 as the next digit of our solution. 
Result so far: 36667.0
The remainder is 82 after subtracting 4102 from 4184.
Since there are no more digits in the dividend, we add a zero to the remainder making it 820, and continue the process.

Step 9:
The number 586 fits into 820 1 times, leaving a remainder of 234.
Put 1 as the next digit of the answer. 
Result so far: 36667.1
The remainder is 234 after subtracting 586 from 820.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2340, and continue the process.

Going ahead to step 10:
2340 divided by 586 is 3 with a remainder of 582.
Put 3 as the next digit of the answer. 
Result so far: 36667.13
Subtracting 1758 from 2340 leaves us with 582.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5820, and continue the process.

Step 11:
5820 divided by 586 is 9 with a remainder of 546.
Use 9 as the next digit of our solution. 
Result so far: 36667.139
The remainder is 546 after subtracting 5274 from 5820.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5460, and continue the process.

Going ahead to step 12:
586 can be fit into 5460 9 times, resulting in a remainder of 186.
Use 9 as the next digit of our solution. 
Result so far: 36667.1399
The remainder is 186 after subtracting 5274 from 5460.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1860, and continue the process.

The quotient of the division is 36667.1399, and the remainder is 0.00186.