We look at the division of 813681 by 187 
The aim is to understand the frequency of 187 in 813681.

Going ahead to step 1:
187 goes into 8 0 times with a remainder of 8.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 8 and we're left with 8.
Grab the next digit (1) from the dividend, add it to 8, then carry on: 81 / 187

Let's proceed to step 2:
81 divided by 187 is 0 with a remainder of 81.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 81, we end up with 81.
Append the next digit (3) from the dividend to 81 and continue with: 813 / 187

Moving on to step 3:
If we divide 813 by 187, we get 4 and a remainder of 65.
Use 4 as the next digit of our solution. 
Result so far: 4.0
Deduct 748 from 813 and we're left with 65.
Fetch the next digit (6) from the dividend, attach it to 65 and continue: 656 / 187

Advancing to step 4:
When dividing 656 by 187, we get 3 with a remainder of 95.
The number 3 becomes the next digit in our result. 
Result so far: 43.0
Subtracting 561 from 656 leaves us with 95.
Bring next digit (8) of the dividend behind the 95 and repeat the process: 958 / 187

Step 5:
When dividing 958 by 187, we get 5 with a remainder of 23.
The next digit of our result is 5. 
Result so far: 435.0
If we take 935 away from 958, we end up with 23.
Grab the next digit (1) from the dividend, add it to 23, then carry on: 231 / 187

Advancing to step 6:
187 goes into 231 1 times with a remainder of 44.
The number 1 becomes the next digit in our result. 
Result so far: 4351.0
Deduct 187 from 231 and we're left with 44.
Since there are no more digits in the dividend, we add a zero to the remainder making it 440, and continue the process.

Let's proceed to step 7:
187 can be fit into 440 2 times, resulting in a remainder of 66.
Record the quotient 2 as the next digit in the result. 
Result so far: 4351.2
Subtract 374 from 440 to get 66.
Since there are no more digits in the dividend, we add a zero to the remainder making it 660, and continue the process.

Moving on to step 8:
If we divide 660 by 187, we get 3 and a remainder of 99.
The number 3 becomes the next digit in our result. 
Result so far: 4351.23
Deduct 561 from 660 and we're left with 99.
Since there are no more digits in the dividend, we add a zero to the remainder making it 990, and continue the process.

Moving on to step 9:
187 can be fit into 990 5 times, resulting in a remainder of 55.
Record the quotient 5 as the next digit in the result. 
Result so far: 4351.235
Deduct 935 from 990 and we're left with 55.
Since there are no more digits in the dividend, we add a zero to the remainder making it 550, and continue the process.

On to step 10:
187 goes into 550 2 times with a remainder of 176.
Put 2 as the next digit of the answer. 
Result so far: 4351.2352
Deduct 374 from 550 and we're left with 176.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1760, and continue the process.

Step 11:
The number 187 fits into 1760 9 times, leaving a remainder of 77.
Record the quotient 9 as the next digit in the result. 
Result so far: 4351.23529
Subtract 1683 from 1760 to get 77.
Since there are no more digits in the dividend, we add a zero to the remainder making it 770, and continue the process.

On to step 12:
The number 187 fits into 770 4 times, leaving a remainder of 22.
Record the quotient 4 as the next digit in the result. 
Result so far: 4351.235294
If we subtract 748 from 770, we get 22.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

Going ahead to step 13:
If we divide 220 by 187, we get 1 and a remainder of 33.
Use 1 as the next digit of our solution. 
Result so far: 4351.2352941
Subtract 187 from 220 to get 33.
Since there are no more digits in the dividend, we add a zero to the remainder making it 330, and continue the process.

Advancing to step 14:
187 can be fit into 330 1 times, resulting in a remainder of 143.
Record the quotient 1 as the next digit in the result. 
Result so far: 4351.23529411
Subtracting 187 from 330 leaves us with 143.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1430, and continue the process.

After the division, we end up with 4351.23529411 and a remainder of 1.43e-07.