12421847 divided by 171 
The aim is to understand the frequency of 171 in 12421847.

Moving on to step 1:
The number 171 fits into 1 0 times, leaving a remainder of 1.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 1 leaves us with 1.
Fetch the next digit (2) from the dividend, attach it to 1 and continue: 12 / 171

Going ahead to step 2:
The number 171 fits into 12 0 times, leaving a remainder of 12.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 12 after subtracting 0 from 12.
Include the next digit (4) from the dividend after 12, then repeat: 124 / 171

On to step 3:
124 divided by 171 is 0 with a remainder of 124.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 124, we end up with 124.
Take the next digit (2) from the dividend and append it to 124, then repeat: 1242 / 171

On to step 4:
The number 171 fits into 1242 7 times, leaving a remainder of 45.
Write down 7 as next digit of the result. 
Result so far: 7.0
Subtracting 1197 from 1242 leaves us with 45.
Bring next digit (1) of the dividend behind the 45 and repeat the process: 451 / 171

On to step 5:
When dividing 451 by 171, we get 2 with a remainder of 109.
The next digit of our result is 2. 
Result so far: 72.0
Subtracting 342 from 451 leaves us with 109.
Append the next digit (8) from the dividend to 109 and continue with: 1098 / 171

On to step 6:
The number 171 fits into 1098 6 times, leaving a remainder of 72.
Use 6 as the next digit of our solution. 
Result so far: 726.0
If we take 1026 away from 1098, we end up with 72.
Bring next digit (4) of the dividend behind the 72 and repeat the process: 724 / 171

Advancing to step 7:
171 can be fit into 724 4 times, resulting in a remainder of 40.
The number 4 becomes the next digit in our result. 
Result so far: 7264.0
Subtracting 684 from 724 leaves us with 40.
Include the next digit (7) from the dividend after 40, then repeat: 407 / 171

Advancing to step 8:
171 goes into 407 2 times with a remainder of 65.
The next digit of our result is 2. 
Result so far: 72642.0
Subtracting 342 from 407 leaves us with 65.
Since there are no more digits in the dividend, we add a zero to the remainder making it 650, and continue the process.

Advancing to step 9:
The number 171 fits into 650 3 times, leaving a remainder of 137.
Put 3 as the next digit of the answer. 
Result so far: 72642.3
Deduct 513 from 650 and we're left with 137.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1370, and continue the process.

Advancing to step 10:
The number 171 fits into 1370 8 times, leaving a remainder of 2.
Record the quotient 8 as the next digit in the result. 
Result so far: 72642.38
If we subtract 1368 from 1370, we get 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Moving on to step 11:
171 can be fit into 20 0 times, resulting in a remainder of 20.
Record the quotient 0 as the next digit in the result. 
Result so far: 72642.38
Subtract 0 from 20 to get 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

On to step 12:
171 goes into 200 1 times with a remainder of 29.
Use 1 as the next digit of our solution. 
Result so far: 72642.3801
The remainder is 29 after subtracting 171 from 200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 290, and continue the process.

On to step 13:
When dividing 290 by 171, we get 1 with a remainder of 119.
Use 1 as the next digit of our solution. 
Result so far: 72642.38011
The remainder is 119 after subtracting 171 from 290.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1190, and continue the process.

After the division, we end up with 72642.38011 and a remainder of 0.000119.