6421809 divided by 201 
The aim is to understand the frequency of 201 in 6421809.

On to step 1:
If we divide 6 by 201, we get 0 and a remainder of 6.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 6 and we're left with 6.
Take the next digit (4) from the dividend and append it to 6, then repeat: 64 / 201

Let's proceed to step 2:
If we divide 64 by 201, we get 0 and a remainder of 64.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 64 leaves us with 64.
Include the next digit (2) from the dividend after 64, then repeat: 642 / 201

Advancing to step 3:
201 can be fit into 642 3 times, resulting in a remainder of 39.
Write down 3 as next digit of the result. 
Result so far: 3.0
If we take 603 away from 642, we end up with 39.
Append the next digit (1) from the dividend to 39 and continue with: 391 / 201

On to step 4:
The number 201 fits into 391 1 times, leaving a remainder of 190.
The next digit of our result is 1. 
Result so far: 31.0
If we subtract 201 from 391, we get 190.
Append the next digit (8) from the dividend to 190 and continue with: 1908 / 201

Going ahead to step 5:
201 can be fit into 1908 9 times, resulting in a remainder of 99.
The number 9 becomes the next digit in our result. 
Result so far: 319.0
If we take 1809 away from 1908, we end up with 99.
Fetch the next digit (0) from the dividend, attach it to 99 and continue: 990 / 201

Advancing to step 6:
990 divided by 201 is 4 with a remainder of 186.
Record the quotient 4 as the next digit in the result. 
Result so far: 3194.0
Subtracting 804 from 990 leaves us with 186.
Append the next digit (9) from the dividend to 186 and continue with: 1869 / 201

On to step 7:
1869 divided by 201 is 9 with a remainder of 60.
Put 9 as the next digit of the answer. 
Result so far: 31949.0
Deduct 1809 from 1869 and we're left with 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Moving on to step 8:
600 divided by 201 is 2 with a remainder of 198.
The number 2 becomes the next digit in our result. 
Result so far: 31949.2
If we take 402 away from 600, we end up with 198.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1980, and continue the process.

Going ahead to step 9:
The number 201 fits into 1980 9 times, leaving a remainder of 171.
Write down 9 as next digit of the result. 
Result so far: 31949.29
Subtracting 1809 from 1980 leaves us with 171.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1710, and continue the process.

Step 10:
1710 divided by 201 is 8 with a remainder of 102.
Record the quotient 8 as the next digit in the result. 
Result so far: 31949.298
Subtracting 1608 from 1710 leaves us with 102.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1020, and continue the process.

On to step 11:
The number 201 fits into 1020 5 times, leaving a remainder of 15.
Write down 5 as next digit of the result. 
Result so far: 31949.2985
Deduct 1005 from 1020 and we're left with 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

On to step 12:
201 goes into 150 0 times with a remainder of 150.
The number 0 becomes the next digit in our result. 
Result so far: 31949.2985
If we subtract 0 from 150, we get 150.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1500, and continue the process.

Going ahead to step 13:
201 goes into 1500 7 times with a remainder of 93.
Use 7 as the next digit of our solution. 
Result so far: 31949.298507
If we take 1407 away from 1500, we end up with 93.
Since there are no more digits in the dividend, we add a zero to the remainder making it 930, and continue the process.

Moving on to step 14:
The number 201 fits into 930 4 times, leaving a remainder of 126.
The number 4 becomes the next digit in our result. 
Result so far: 31949.2985074
Deduct 804 from 930 and we're left with 126.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1260, and continue the process.

Moving on to step 15:
201 goes into 1260 6 times with a remainder of 54.
Put 6 as the next digit of the answer. 
Result so far: 31949.29850746
If we take 1206 away from 1260, we end up with 54.
Since there are no more digits in the dividend, we add a zero to the remainder making it 540, and continue the process.

After the division, we end up with 31949.29850746 and a remainder of 5.4e-08.