We're dividing 64521824 by 520 
The aim is to understand the frequency of 520 in 64521824.

Moving on to step 1:
The number 520 fits into 6 0 times, leaving a remainder of 6.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 6, we end up with 6.
Take the next digit (4) from the dividend and append it to 6, then repeat: 64 / 520

Moving on to step 2:
When dividing 64 by 520, we get 0 with a remainder of 64.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 64, we end up with 64.
Take the next digit (5) from the dividend and append it to 64, then repeat: 645 / 520

Moving on to step 3:
645 divided by 520 is 1 with a remainder of 125.
Use 1 as the next digit of our solution. 
Result so far: 1.0
If we take 520 away from 645, we end up with 125.
Take the next digit (2) from the dividend and append it to 125, then repeat: 1252 / 520

On to step 4:
When dividing 1252 by 520, we get 2 with a remainder of 212.
The next digit of our result is 2. 
Result so far: 12.0
The remainder is 212 after subtracting 1040 from 1252.
Bring next digit (1) of the dividend behind the 212 and repeat the process: 2121 / 520

Moving on to step 5:
520 goes into 2121 4 times with a remainder of 41.
Record the quotient 4 as the next digit in the result. 
Result so far: 124.0
Deduct 2080 from 2121 and we're left with 41.
Grab the next digit (8) from the dividend, add it to 41, then carry on: 418 / 520

Advancing to step 6:
418 divided by 520 is 0 with a remainder of 418.
Put 0 as the next digit of the answer. 
Result so far: 1240.0
If we take 0 away from 418, we end up with 418.
Append the next digit (2) from the dividend to 418 and continue with: 4182 / 520

Advancing to step 7:
520 goes into 4182 8 times with a remainder of 22.
Use 8 as the next digit of our solution. 
Result so far: 12408.0
Subtract 4160 from 4182 to get 22.
Grab the next digit (4) from the dividend, add it to 22, then carry on: 224 / 520

Let's proceed to step 8:
520 can be fit into 224 0 times, resulting in a remainder of 224.
The next digit of our result is 0. 
Result so far: 124080.0
The remainder is 224 after subtracting 0 from 224.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2240, and continue the process.

Advancing to step 9:
When dividing 2240 by 520, we get 4 with a remainder of 160.
The next digit of our result is 4. 
Result so far: 124080.4
If we subtract 2080 from 2240, we get 160.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1600, and continue the process.

Advancing to step 10:
If we divide 1600 by 520, we get 3 and a remainder of 40.
The next digit of our result is 3. 
Result so far: 124080.43
Subtract 1560 from 1600 to get 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Advancing to step 11:
When dividing 400 by 520, we get 0 with a remainder of 400.
Put 0 as the next digit of the answer. 
Result so far: 124080.43
If we subtract 0 from 400, we get 400.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4000, and continue the process.

Step 12:
4000 divided by 520 is 7 with a remainder of 360.
Record the quotient 7 as the next digit in the result. 
Result so far: 124080.4307
Subtracting 3640 from 4000 leaves us with 360.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3600, and continue the process.

Let's proceed to step 13:
If we divide 3600 by 520, we get 6 and a remainder of 480.
Record the quotient 6 as the next digit in the result. 
Result so far: 124080.43076
Subtract 3120 from 3600 to get 480.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4800, and continue the process.

Going ahead to step 14:
If we divide 4800 by 520, we get 9 and a remainder of 120.
Use 9 as the next digit of our solution. 
Result so far: 124080.430769
If we subtract 4680 from 4800, we get 120.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1200, and continue the process.

Advancing to step 15:
When dividing 1200 by 520, we get 2 with a remainder of 160.
Use 2 as the next digit of our solution. 
Result so far: 124080.4307692
Subtracting 1040 from 1200 leaves us with 160.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1600, and continue the process.

Let's proceed to step 16:
When dividing 1600 by 520, we get 3 with a remainder of 40.
The next digit of our result is 3. 
Result so far: 124080.43076923
Subtract 1560 from 1600 to get 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

In conclusion, the division gives 124080.43076923 with a balance of 4e-08.