21131899 ÷ 529 
The aim is to understand the frequency of 529 in 21131899.

Going ahead to step 1:
2 divided by 529 is 0 with a remainder of 2.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 2, we get 2.
Bring next digit (1) of the dividend behind the 2 and repeat the process: 21 / 529

Moving on to step 2:
If we divide 21 by 529, we get 0 and a remainder of 21.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 21 to get 21.
Grab the next digit (1) from the dividend, add it to 21, then carry on: 211 / 529

Let's proceed to step 3:
211 divided by 529 is 0 with a remainder of 211.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 211 and we're left with 211.
Append the next digit (3) from the dividend to 211 and continue with: 2113 / 529

Going ahead to step 4:
529 goes into 2113 3 times with a remainder of 526.
The number 3 becomes the next digit in our result. 
Result so far: 3.0
If we take 1587 away from 2113, we end up with 526.
Append the next digit (1) from the dividend to 526 and continue with: 5261 / 529

Let's proceed to step 5:
When dividing 5261 by 529, we get 9 with a remainder of 500.
Use 9 as the next digit of our solution. 
Result so far: 39.0
If we subtract 4761 from 5261, we get 500.
Grab the next digit (8) from the dividend, add it to 500, then carry on: 5008 / 529

Moving on to step 6:
529 goes into 5008 9 times with a remainder of 247.
Put 9 as the next digit of the answer. 
Result so far: 399.0
If we take 4761 away from 5008, we end up with 247.
Include the next digit (9) from the dividend after 247, then repeat: 2479 / 529

On to step 7:
529 can be fit into 2479 4 times, resulting in a remainder of 363.
Put 4 as the next digit of the answer. 
Result so far: 3994.0
If we take 2116 away from 2479, we end up with 363.
Fetch the next digit (9) from the dividend, attach it to 363 and continue: 3639 / 529

Advancing to step 8:
3639 divided by 529 is 6 with a remainder of 465.
Put 6 as the next digit of the answer. 
Result so far: 39946.0
The remainder is 465 after subtracting 3174 from 3639.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4650, and continue the process.

Going ahead to step 9:
When dividing 4650 by 529, we get 8 with a remainder of 418.
The next digit of our result is 8. 
Result so far: 39946.8
Subtract 4232 from 4650 to get 418.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4180, and continue the process.

Advancing to step 10:
When dividing 4180 by 529, we get 7 with a remainder of 477.
Write down 7 as next digit of the result. 
Result so far: 39946.87
The remainder is 477 after subtracting 3703 from 4180.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4770, and continue the process.

Going ahead to step 11:
If we divide 4770 by 529, we get 9 and a remainder of 9.
Write down 9 as next digit of the result. 
Result so far: 39946.879
Subtracting 4761 from 4770 leaves us with 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Moving on to step 12:
90 divided by 529 is 0 with a remainder of 90.
Use 0 as the next digit of our solution. 
Result so far: 39946.879
The remainder is 90 after subtracting 0 from 90.
Since there are no more digits in the dividend, we add a zero to the remainder making it 900, and continue the process.

On to step 13:
When dividing 900 by 529, we get 1 with a remainder of 371.
Write down 1 as next digit of the result. 
Result so far: 39946.87901
Subtract 529 from 900 to get 371.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3710, and continue the process.

On to step 14:
3710 divided by 529 is 7 with a remainder of 7.
The number 7 becomes the next digit in our result. 
Result so far: 39946.879017
If we take 3703 away from 3710, we end up with 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

Let's proceed to step 15:
The number 529 fits into 70 0 times, leaving a remainder of 70.
Put 0 as the next digit of the answer. 
Result so far: 39946.879017
If we take 0 away from 70, we end up with 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

Moving on to step 16:
529 goes into 700 1 times with a remainder of 171.
Write down 1 as next digit of the result. 
Result so far: 39946.87901701
If we subtract 529 from 700, we get 171.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1710, and continue the process.

In conclusion, the division gives 39946.87901701 with a balance of 1.71e-07.