9872 ÷ 49 
The aim is to understand the frequency of 49 in 9872.

Step 1:
When dividing 9 by 49, we get 0 with a remainder of 9.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 9 and we're left with 9.
Bring next digit (8) of the dividend behind the 9 and repeat the process: 98 / 49

Let's proceed to step 2:
98 divided by 49 is 2 with a remainder of 0.
The number 2 becomes the next digit in our result. 
Result so far: 2.0
The remainder is 0 after subtracting 98 from 98.
Bring next digit (7) of the dividend behind the 0 and repeat the process: 7 / 49

Advancing to step 3:
When dividing 7 by 49, we get 0 with a remainder of 7.
The next digit of our result is 0. 
Result so far: 20.0
The remainder is 7 after subtracting 0 from 7.
Take the next digit (2) from the dividend and append it to 7, then repeat: 72 / 49

Let's proceed to step 4:
49 can be fit into 72 1 times, resulting in a remainder of 23.
Use 1 as the next digit of our solution. 
Result so far: 201.0
The remainder is 23 after subtracting 49 from 72.
Since there are no more digits in the dividend, we add a zero to the remainder making it 230, and continue the process.

On to step 5:
The number 49 fits into 230 4 times, leaving a remainder of 34.
Write down 4 as next digit of the result. 
Result so far: 201.4
If we subtract 196 from 230, we get 34.
Since there are no more digits in the dividend, we add a zero to the remainder making it 340, and continue the process.

Advancing to step 6:
When dividing 340 by 49, we get 6 with a remainder of 46.
The number 6 becomes the next digit in our result. 
Result so far: 201.46
Subtract 294 from 340 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.

Let's proceed to step 7:
If we divide 460 by 49, we get 9 and a remainder of 19.
Use 9 as the next digit of our solution. 
Result so far: 201.469
Deduct 441 from 460 and we're left with 19.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

Going ahead to step 8:
49 goes into 190 3 times with a remainder of 43.
Record the quotient 3 as the next digit in the result. 
Result so far: 201.4693
If we subtract 147 from 190, we get 43.
Since there are no more digits in the dividend, we add a zero to the remainder making it 430, and continue the process.

On to step 9:
If we divide 430 by 49, we get 8 and a remainder of 38.
Use 8 as the next digit of our solution. 
Result so far: 201.46938
Subtract 392 from 430 to get 38.
Since there are no more digits in the dividend, we add a zero to the remainder making it 380, and continue the process.

Moving on to step 10:
If we divide 380 by 49, we get 7 and a remainder of 37.
Write down 7 as next digit of the result. 
Result so far: 201.469387
If we subtract 343 from 380, we get 37.
Since there are no more digits in the dividend, we add a zero to the remainder making it 370, and continue the process.

Step 11:
49 goes into 370 7 times with a remainder of 27.
Write down 7 as next digit of the result. 
Result so far: 201.4693877
If we take 343 away from 370, we end up with 27.
Since there are no more digits in the dividend, we add a zero to the remainder making it 270, and continue the process.

In conclusion, the division gives 201.4693877 with a balance of 2.7e-07.