57421000 divided by 520 
The aim is to understand the frequency of 520 in 57421000.

Going ahead to step 1:
520 can be fit into 5 0 times, resulting in a remainder of 5.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 5, we get 5.
Fetch the next digit (7) from the dividend, attach it to 5 and continue: 57 / 520

Advancing to step 2:
520 can be fit into 57 0 times, resulting in a remainder of 57.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 57 leaves us with 57.
Append the next digit (4) from the dividend to 57 and continue with: 574 / 520

Step 3:
The number 520 fits into 574 1 times, leaving a remainder of 54.
Put 1 as the next digit of the answer. 
Result so far: 1.0
If we take 520 away from 574, we end up with 54.
Grab the next digit (2) from the dividend, add it to 54, then carry on: 542 / 520

Let's proceed to step 4:
The number 520 fits into 542 1 times, leaving a remainder of 22.
Put 1 as the next digit of the answer. 
Result so far: 11.0
If we subtract 520 from 542, we get 22.
Take the next digit (1) from the dividend and append it to 22, then repeat: 221 / 520

On to step 5:
If we divide 221 by 520, we get 0 and a remainder of 221.
Use 0 as the next digit of our solution. 
Result so far: 110.0
Deduct 0 from 221 and we're left with 221.
Take the next digit (0) from the dividend and append it to 221, then repeat: 2210 / 520

Step 6:
520 goes into 2210 4 times with a remainder of 130.
The number 4 becomes the next digit in our result. 
Result so far: 1104.0
The remainder is 130 after subtracting 2080 from 2210.
Append the next digit (0) from the dividend to 130 and continue with: 1300 / 520

Advancing to step 7:
520 goes into 1300 2 times with a remainder of 260.
Record the quotient 2 as the next digit in the result. 
Result so far: 11042.0
If we subtract 1040 from 1300, we get 260.
Append the next digit (0) from the dividend to 260 and continue with: 2600 / 520

Moving on to step 8:
The number 520 fits into 2600 5 times, leaving a remainder of 0.
The next digit of our result is 5. 
Result so far: 110425.0
Subtracting 2600 from 2600 leaves us with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Let's proceed to step 9:
When dividing 0 by 520, we get 0 with a remainder of 0.
The next digit of our result is 0. 
Result so far: 110425.0
Subtract 0 from 0 to get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Going ahead to step 10:
When dividing 0 by 520, we get 0 with a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 110425.0
Deduct 0 from 0 and we're left with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

The final outcome is 110425.0, with a leftover of 0.0.