81644187 ÷ 371 
The aim is to understand the frequency of 371 in 81644187.

On to step 1:
371 goes into 8 0 times with a remainder of 8.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 8, we get 8.
Include the next digit (1) from the dividend after 8, then repeat: 81 / 371

Step 2:
If we divide 81 by 371, we get 0 and a remainder of 81.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 81 after subtracting 0 from 81.
Grab the next digit (6) from the dividend, add it to 81, then carry on: 816 / 371

Going ahead to step 3:
371 goes into 816 2 times with a remainder of 74.
Write down 2 as next digit of the result. 
Result so far: 2.0
If we take 742 away from 816, we end up with 74.
Take the next digit (4) from the dividend and append it to 74, then repeat: 744 / 371

Let's proceed to step 4:
When dividing 744 by 371, we get 2 with a remainder of 2.
Write down 2 as next digit of the result. 
Result so far: 22.0
The remainder is 2 after subtracting 742 from 744.
Take the next digit (4) from the dividend and append it to 2, then repeat: 24 / 371

Advancing to step 5:
If we divide 24 by 371, we get 0 and a remainder of 24.
Record the quotient 0 as the next digit in the result. 
Result so far: 220.0
Deduct 0 from 24 and we're left with 24.
Append the next digit (1) from the dividend to 24 and continue with: 241 / 371

Going ahead to step 6:
If we divide 241 by 371, we get 0 and a remainder of 241.
Put 0 as the next digit of the answer. 
Result so far: 2200.0
Deduct 0 from 241 and we're left with 241.
Bring next digit (8) of the dividend behind the 241 and repeat the process: 2418 / 371

On to step 7:
371 can be fit into 2418 6 times, resulting in a remainder of 192.
Write down 6 as next digit of the result. 
Result so far: 22006.0
Subtract 2226 from 2418 to get 192.
Append the next digit (7) from the dividend to 192 and continue with: 1927 / 371

Moving on to step 8:
371 can be fit into 1927 5 times, resulting in a remainder of 72.
Use 5 as the next digit of our solution. 
Result so far: 220065.0
The remainder is 72 after subtracting 1855 from 1927.
Since there are no more digits in the dividend, we add a zero to the remainder making it 720, and continue the process.

Going ahead to step 9:
371 goes into 720 1 times with a remainder of 349.
Put 1 as the next digit of the answer. 
Result so far: 220065.1
If we take 371 away from 720, we end up with 349.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3490, and continue the process.

Advancing to step 10:
When dividing 3490 by 371, we get 9 with a remainder of 151.
The number 9 becomes the next digit in our result. 
Result so far: 220065.19
Subtract 3339 from 3490 to get 151.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1510, and continue the process.

Advancing to step 11:
371 goes into 1510 4 times with a remainder of 26.
Use 4 as the next digit of our solution. 
Result so far: 220065.194
Subtracting 1484 from 1510 leaves us with 26.
Since there are no more digits in the dividend, we add a zero to the remainder making it 260, and continue the process.

Going ahead to step 12:
260 divided by 371 is 0 with a remainder of 260.
Put 0 as the next digit of the answer. 
Result so far: 220065.194
Subtracting 0 from 260 leaves us with 260.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2600, and continue the process.

Let's proceed to step 13:
When dividing 2600 by 371, we get 7 with a remainder of 3.
Put 7 as the next digit of the answer. 
Result so far: 220065.19407
Subtract 2597 from 2600 to get 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

On to step 14:
The number 371 fits into 30 0 times, leaving a remainder of 30.
The next digit of our result is 0. 
Result so far: 220065.19407
Subtract 0 from 30 to get 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Step 15:
If we divide 300 by 371, we get 0 and a remainder of 300.
The number 0 becomes the next digit in our result. 
Result so far: 220065.19407
The remainder is 300 after subtracting 0 from 300.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3000, and continue the process.

The final result is 220065.19407 with a remainder of 3e-06.