Let's divide 15201971 by 907
The aim is to understand the frequency of 907 in 15201971.

Let's proceed to step 1:
907 can be fit into 1 0 times, resulting in a remainder of 1.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 1, we get 1.
Bring next digit (5) of the dividend behind the 1 and repeat the process: 15 / 907

On to step 2:
907 can be fit into 15 0 times, resulting in a remainder of 15.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 15 leaves us with 15.
Bring next digit (2) of the dividend behind the 15 and repeat the process: 152 / 907

On to step 3:
The number 907 fits into 152 0 times, leaving a remainder of 152.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 152, we end up with 152.
Bring next digit (0) of the dividend behind the 152 and repeat the process: 1520 / 907

Step 4:
When dividing 1520 by 907, we get 1 with a remainder of 613.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
The remainder is 613 after subtracting 907 from 1520.
Take the next digit (1) from the dividend and append it to 613, then repeat: 6131 / 907

Advancing to step 5:
If we divide 6131 by 907, we get 6 and a remainder of 689.
Write down 6 as next digit of the result. 
Result so far: 16.0
Subtracting 5442 from 6131 leaves us with 689.
Include the next digit (9) from the dividend after 689, then repeat: 6899 / 907

Let's proceed to step 6:
When dividing 6899 by 907, we get 7 with a remainder of 550.
Use 7 as the next digit of our solution. 
Result so far: 167.0
If we subtract 6349 from 6899, we get 550.
Include the next digit (7) from the dividend after 550, then repeat: 5507 / 907

Advancing to step 7:
907 can be fit into 5507 6 times, resulting in a remainder of 65.
Write down 6 as next digit of the result. 
Result so far: 1676.0
If we take 5442 away from 5507, we end up with 65.
Bring next digit (1) of the dividend behind the 65 and repeat the process: 651 / 907

Going ahead to step 8:
If we divide 651 by 907, we get 0 and a remainder of 651.
The next digit of our result is 0. 
Result so far: 16760.0
Deduct 0 from 651 and we're left with 651.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6510, and continue the process.

Advancing to step 9:
907 can be fit into 6510 7 times, resulting in a remainder of 161.
Use 7 as the next digit of our solution. 
Result so far: 16760.7
Subtract 6349 from 6510 to get 161.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1610, and continue the process.

Going ahead to step 10:
If we divide 1610 by 907, we get 1 and a remainder of 703.
The next digit of our result is 1. 
Result so far: 16760.71
If we take 907 away from 1610, we end up with 703.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7030, and continue the process.

Moving on to step 11:
907 can be fit into 7030 7 times, resulting in a remainder of 681.
Record the quotient 7 as the next digit in the result. 
Result so far: 16760.717
Deduct 6349 from 7030 and we're left with 681.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6810, and continue the process.

Let's proceed to step 12:
6810 divided by 907 is 7 with a remainder of 461.
The next digit of our result is 7. 
Result so far: 16760.7177
If we take 6349 away from 6810, we end up with 461.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4610, and continue the process.

After the division, we end up with 16760.7177 and a remainder of 0.00461.