We look at the division of 59143363 by 821 
The aim is to understand the frequency of 821 in 59143363.

Moving on to step 1:
5 divided by 821 is 0 with a remainder of 5.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 5 leaves us with 5.
Append the next digit (9) from the dividend to 5 and continue with: 59 / 821

Advancing to step 2:
If we divide 59 by 821, we get 0 and a remainder of 59.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 59 and we're left with 59.
Take the next digit (1) from the dividend and append it to 59, then repeat: 591 / 821

Advancing to step 3:
The number 821 fits into 591 0 times, leaving a remainder of 591.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 591, we end up with 591.
Bring next digit (4) of the dividend behind the 591 and repeat the process: 5914 / 821

On to step 4:
5914 divided by 821 is 7 with a remainder of 167.
Write down 7 as next digit of the result. 
Result so far: 7.0
Deduct 5747 from 5914 and we're left with 167.
Grab the next digit (3) from the dividend, add it to 167, then carry on: 1673 / 821

Let's proceed to step 5:
The number 821 fits into 1673 2 times, leaving a remainder of 31.
The next digit of our result is 2. 
Result so far: 72.0
Subtracting 1642 from 1673 leaves us with 31.
Grab the next digit (3) from the dividend, add it to 31, then carry on: 313 / 821

Advancing to step 6:
313 divided by 821 is 0 with a remainder of 313.
Use 0 as the next digit of our solution. 
Result so far: 720.0
If we subtract 0 from 313, we get 313.
Bring next digit (6) of the dividend behind the 313 and repeat the process: 3136 / 821

Step 7:
3136 divided by 821 is 3 with a remainder of 673.
The next digit of our result is 3. 
Result so far: 7203.0
Subtracting 2463 from 3136 leaves us with 673.
Fetch the next digit (3) from the dividend, attach it to 673 and continue: 6733 / 821

Going ahead to step 8:
If we divide 6733 by 821, we get 8 and a remainder of 165.
Put 8 as the next digit of the answer. 
Result so far: 72038.0
If we subtract 6568 from 6733, we get 165.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1650, and continue the process.

On to step 9:
The number 821 fits into 1650 2 times, leaving a remainder of 8.
Record the quotient 2 as the next digit in the result. 
Result so far: 72038.2
Deduct 1642 from 1650 and we're left with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Step 10:
When dividing 80 by 821, we get 0 with a remainder of 80.
The next digit of our result is 0. 
Result so far: 72038.2
The remainder is 80 after subtracting 0 from 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

On to step 11:
The number 821 fits into 800 0 times, leaving a remainder of 800.
Record the quotient 0 as the next digit in the result. 
Result so far: 72038.2
The remainder is 800 after subtracting 0 from 800.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8000, and continue the process.

The final outcome is 72038.2, with a leftover of 0.08.