We look at the division of 81401861 by 305 
The aim is to understand the frequency of 305 in 81401861.

Step 1:
If we divide 8 by 305, we get 0 and a remainder of 8.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 8 leaves us with 8.
Grab the next digit (1) from the dividend, add it to 8, then carry on: 81 / 305

Going ahead to step 2:
When dividing 81 by 305, we get 0 with a remainder of 81.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 81 to get 81.
Take the next digit (4) from the dividend and append it to 81, then repeat: 814 / 305

On to step 3:
When dividing 814 by 305, we get 2 with a remainder of 204.
Write down 2 as next digit of the result. 
Result so far: 2.0
If we subtract 610 from 814, we get 204.
Grab the next digit (0) from the dividend, add it to 204, then carry on: 2040 / 305

Advancing to step 4:
305 goes into 2040 6 times with a remainder of 210.
Put 6 as the next digit of the answer. 
Result so far: 26.0
The remainder is 210 after subtracting 1830 from 2040.
Append the next digit (1) from the dividend to 210 and continue with: 2101 / 305

Moving on to step 5:
305 can be fit into 2101 6 times, resulting in a remainder of 271.
Record the quotient 6 as the next digit in the result. 
Result so far: 266.0
If we take 1830 away from 2101, we end up with 271.
Append the next digit (8) from the dividend to 271 and continue with: 2718 / 305

Step 6:
305 goes into 2718 8 times with a remainder of 278.
The number 8 becomes the next digit in our result. 
Result so far: 2668.0
If we subtract 2440 from 2718, we get 278.
Fetch the next digit (6) from the dividend, attach it to 278 and continue: 2786 / 305

Moving on to step 7:
305 can be fit into 2786 9 times, resulting in a remainder of 41.
Use 9 as the next digit of our solution. 
Result so far: 26689.0
Subtracting 2745 from 2786 leaves us with 41.
Append the next digit (1) from the dividend to 41 and continue with: 411 / 305

Advancing to step 8:
The number 305 fits into 411 1 times, leaving a remainder of 106.
Record the quotient 1 as the next digit in the result. 
Result so far: 266891.0
If we subtract 305 from 411, we get 106.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1060, and continue the process.

Moving on to step 9:
When dividing 1060 by 305, we get 3 with a remainder of 145.
Record the quotient 3 as the next digit in the result. 
Result so far: 266891.3
Subtract 915 from 1060 to get 145.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1450, and continue the process.

Step 10:
When dividing 1450 by 305, we get 4 with a remainder of 230.
Use 4 as the next digit of our solution. 
Result so far: 266891.34
If we subtract 1220 from 1450, we get 230.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2300, and continue the process.

Advancing to step 11:
305 goes into 2300 7 times with a remainder of 165.
The next digit of our result is 7. 
Result so far: 266891.347
The remainder is 165 after subtracting 2135 from 2300.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1650, and continue the process.

Going ahead to step 12:
305 goes into 1650 5 times with a remainder of 125.
The number 5 becomes the next digit in our result. 
Result so far: 266891.3475
If we subtract 1525 from 1650, we get 125.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1250, and continue the process.

Going ahead to step 13:
When dividing 1250 by 305, we get 4 with a remainder of 30.
The next digit of our result is 4. 
Result so far: 266891.34754
If we subtract 1220 from 1250, we 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.

Advancing to step 14:
305 goes into 300 0 times with a remainder of 300.
Write down 0 as next digit of the result. 
Result so far: 266891.34754
Deduct 0 from 300 and we're left with 300.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3000, and continue the process.

Let's proceed to step 15:
When dividing 3000 by 305, we get 9 with a remainder of 255.
Put 9 as the next digit of the answer. 
Result so far: 266891.3475409
If we take 2745 away from 3000, we end up with 255.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2550, and continue the process.

On to step 16:
If we divide 2550 by 305, we get 8 and a remainder of 110.
Record the quotient 8 as the next digit in the result. 
Result so far: 266891.34754098
The remainder is 110 after subtracting 2440 from 2550.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1100, and continue the process.

Our division results in 266891.34754098 with a remaining 1.1e-07.