81571 ÷ 49 
The aim is to understand the frequency of 49 in 81571.

On to step 1:
49 goes into 8 0 times with a remainder of 8.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 8 and we're left with 8.
Take the next digit (1) from the dividend and append it to 8, then repeat: 81 / 49

On to step 2:
The number 49 fits into 81 1 times, leaving a remainder of 32.
Use 1 as the next digit of our solution. 
Result so far: 1.0
If we subtract 49 from 81, we get 32.
Append the next digit (5) from the dividend to 32 and continue with: 325 / 49

Advancing to step 3:
49 can be fit into 325 6 times, resulting in a remainder of 31.
Write down 6 as next digit of the result. 
Result so far: 16.0
Deduct 294 from 325 and we're left with 31.
Append the next digit (7) from the dividend to 31 and continue with: 317 / 49

Moving on to step 4:
49 goes into 317 6 times with a remainder of 23.
The number 6 becomes the next digit in our result. 
Result so far: 166.0
Deduct 294 from 317 and we're left with 23.
Take the next digit (1) from the dividend and append it to 23, then repeat: 231 / 49

Let's proceed to step 5:
49 goes into 231 4 times with a remainder of 35.
Record the quotient 4 as the next digit in the result. 
Result so far: 1664.0
Deduct 196 from 231 and we're left with 35.
Since there are no more digits in the dividend, we add a zero to the remainder making it 350, and continue the process.

Let's proceed to step 6:
49 goes into 350 7 times with a remainder of 7.
Use 7 as the next digit of our solution. 
Result so far: 1664.7
Deduct 343 from 350 and we're left 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.

Step 7:
70 divided by 49 is 1 with a remainder of 21.
Record the quotient 1 as the next digit in the result. 
Result so far: 1664.71
Subtracting 49 from 70 leaves us with 21.
Since there are no more digits in the dividend, we add a zero to the remainder making it 210, and continue the process.

Let's proceed to step 8:
When dividing 210 by 49, we get 4 with a remainder of 14.
Write down 4 as next digit of the result. 
Result so far: 1664.714
If we subtract 196 from 210, we get 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

Step 9:
The number 49 fits into 140 2 times, leaving a remainder of 42.
Use 2 as the next digit of our solution. 
Result so far: 1664.7142
Subtracting 98 from 140 leaves us with 42.
Since there are no more digits in the dividend, we add a zero to the remainder making it 420, and continue the process.

Moving on to step 10:
If we divide 420 by 49, we get 8 and a remainder of 28.
Put 8 as the next digit of the answer. 
Result so far: 1664.71428
If we subtract 392 from 420, we get 28.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

Step 11:
49 can be fit into 280 5 times, resulting in a remainder of 35.
The number 5 becomes the next digit in our result. 
Result so far: 1664.714285
If we take 245 away from 280, we end up with 35.
Since there are no more digits in the dividend, we add a zero to the remainder making it 350, and continue the process.

Moving on to step 12:
49 can be fit into 350 7 times, resulting in a remainder of 7.
The next digit of our result is 7. 
Result so far: 1664.7142857
Subtracting 343 from 350 leaves us 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.

Moving on to step 13:
49 goes into 70 1 times with a remainder of 21.
The number 1 becomes the next digit in our result. 
Result so far: 1664.71428571
The remainder is 21 after subtracting 49 from 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 210, and continue the process.

After the division, we end up with 1664.71428571 and a remainder of 2.1e-08.