68261466 ÷ 521 
The aim is to understand the frequency of 521 in 68261466.

Step 1:
When dividing 6 by 521, we get 0 with a remainder of 6.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 6 leaves us with 6.
Bring next digit (8) of the dividend behind the 6 and repeat the process: 68 / 521

On to step 2:
68 divided by 521 is 0 with a remainder of 68.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 68 and we're left with 68.
Grab the next digit (2) from the dividend, add it to 68, then carry on: 682 / 521

Advancing to step 3:
521 can be fit into 682 1 times, resulting in a remainder of 161.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
If we subtract 521 from 682, we get 161.
Take the next digit (6) from the dividend and append it to 161, then repeat: 1616 / 521

Step 4:
If we divide 1616 by 521, we get 3 and a remainder of 53.
Write down 3 as next digit of the result. 
Result so far: 13.0
The remainder is 53 after subtracting 1563 from 1616.
Append the next digit (1) from the dividend to 53 and continue with: 531 / 521

On to step 5:
If we divide 531 by 521, we get 1 and a remainder of 10.
Use 1 as the next digit of our solution. 
Result so far: 131.0
Subtracting 521 from 531 leaves us with 10.
Append the next digit (4) from the dividend to 10 and continue with: 104 / 521

On to step 6:
104 divided by 521 is 0 with a remainder of 104.
Record the quotient 0 as the next digit in the result. 
Result so far: 1310.0
Subtracting 0 from 104 leaves us with 104.
Fetch the next digit (6) from the dividend, attach it to 104 and continue: 1046 / 521

Step 7:
If we divide 1046 by 521, we get 2 and a remainder of 4.
Use 2 as the next digit of our solution. 
Result so far: 13102.0
Subtracting 1042 from 1046 leaves us with 4.
Fetch the next digit (6) from the dividend, attach it to 4 and continue: 46 / 521

Let's proceed to step 8:
If we divide 46 by 521, we get 0 and a remainder of 46.
The next digit of our result is 0. 
Result so far: 131020.0
Subtract 0 from 46 to get 46.
Since there are no more digits in the dividend, we add a zero to the remainder making it 460, and continue the process.

On to step 9:
521 can be fit into 460 0 times, resulting in a remainder of 460.
Put 0 as the next digit of the answer. 
Result so far: 131020.0
Subtracting 0 from 460 leaves us with 460.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4600, and continue the process.

On to step 10:
521 can be fit into 4600 8 times, resulting in a remainder of 432.
Put 8 as the next digit of the answer. 
Result so far: 131020.08
If we take 4168 away from 4600, we end up with 432.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4320, and continue the process.

Let's proceed to step 11:
The number 521 fits into 4320 8 times, leaving a remainder of 152.
Record the quotient 8 as the next digit in the result. 
Result so far: 131020.088
Subtract 4168 from 4320 to get 152.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1520, and continue the process.

The final result is 131020.088 with a remainder of 0.0152.