Let's divide 65927398 by 521
The aim is to understand the frequency of 521 in 65927398.

Let's proceed to step 1:
The number 521 fits into 6 0 times, leaving a remainder of 6.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 6 and we're left with 6.
Grab the next digit (5) from the dividend, add it to 6, then carry on: 65 / 521

Let's proceed to step 2:
521 goes into 65 0 times with a remainder of 65.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 65 leaves us with 65.
Grab the next digit (9) from the dividend, add it to 65, then carry on: 659 / 521

Going ahead to step 3:
If we divide 659 by 521, we get 1 and a remainder of 138.
Write down 1 as next digit of the result. 
Result so far: 1.0
Deduct 521 from 659 and we're left with 138.
Take the next digit (2) from the dividend and append it to 138, then repeat: 1382 / 521

On to step 4:
When dividing 1382 by 521, we get 2 with a remainder of 340.
Put 2 as the next digit of the answer. 
Result so far: 12.0
If we take 1042 away from 1382, we end up with 340.
Bring next digit (7) of the dividend behind the 340 and repeat the process: 3407 / 521

Advancing to step 5:
521 can be fit into 3407 6 times, resulting in a remainder of 281.
The next digit of our result is 6. 
Result so far: 126.0
Deduct 3126 from 3407 and we're left with 281.
Include the next digit (3) from the dividend after 281, then repeat: 2813 / 521

Moving on to step 6:
2813 divided by 521 is 5 with a remainder of 208.
Put 5 as the next digit of the answer. 
Result so far: 1265.0
If we take 2605 away from 2813, we end up with 208.
Append the next digit (9) from the dividend to 208 and continue with: 2089 / 521

Advancing to step 7:
When dividing 2089 by 521, we get 4 with a remainder of 5.
The number 4 becomes the next digit in our result. 
Result so far: 12654.0
The remainder is 5 after subtracting 2084 from 2089.
Include the next digit (8) from the dividend after 5, then repeat: 58 / 521

On to step 8:
521 can be fit into 58 0 times, resulting in a remainder of 58.
Put 0 as the next digit of the answer. 
Result so far: 126540.0
Subtract 0 from 58 to get 58.
Since there are no more digits in the dividend, we add a zero to the remainder making it 580, and continue the process.

On to step 9:
580 divided by 521 is 1 with a remainder of 59.
The number 1 becomes the next digit in our result. 
Result so far: 126540.1
The remainder is 59 after subtracting 521 from 580.
Since there are no more digits in the dividend, we add a zero to the remainder making it 590, and continue the process.

Step 10:
521 can be fit into 590 1 times, resulting in a remainder of 69.
Write down 1 as next digit of the result. 
Result so far: 126540.11
If we take 521 away from 590, we end up with 69.
Since there are no more digits in the dividend, we add a zero to the remainder making it 690, and continue the process.

The final result is 126540.11 with a remainder of 0.069.