We look at the division of 80621850 by 555 
The aim is to understand the frequency of 555 in 80621850.

Advancing to step 1:
555 goes into 8 0 times with a remainder of 8.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 8 and we're left with 8.
Fetch the next digit (0) from the dividend, attach it to 8 and continue: 80 / 555

Moving on to step 2:
80 divided by 555 is 0 with a remainder of 80.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 80 leaves us with 80.
Append the next digit (6) from the dividend to 80 and continue with: 806 / 555

Step 3:
555 can be fit into 806 1 times, resulting in a remainder of 251.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
Subtracting 555 from 806 leaves us with 251.
Include the next digit (2) from the dividend after 251, then repeat: 2512 / 555

Advancing to step 4:
555 can be fit into 2512 4 times, resulting in a remainder of 292.
Put 4 as the next digit of the answer. 
Result so far: 14.0
Subtracting 2220 from 2512 leaves us with 292.
Bring next digit (1) of the dividend behind the 292 and repeat the process: 2921 / 555

Going ahead to step 5:
The number 555 fits into 2921 5 times, leaving a remainder of 146.
The number 5 becomes the next digit in our result. 
Result so far: 145.0
If we take 2775 away from 2921, we end up with 146.
Take the next digit (8) from the dividend and append it to 146, then repeat: 1468 / 555

Advancing to step 6:
The number 555 fits into 1468 2 times, leaving a remainder of 358.
Write down 2 as next digit of the result. 
Result so far: 1452.0
Subtract 1110 from 1468 to get 358.
Take the next digit (5) from the dividend and append it to 358, then repeat: 3585 / 555

Going ahead to step 7:
555 can be fit into 3585 6 times, resulting in a remainder of 255.
The next digit of our result is 6. 
Result so far: 14526.0
Subtracting 3330 from 3585 leaves us with 255.
Take the next digit (0) from the dividend and append it to 255, then repeat: 2550 / 555

Going ahead to step 8:
555 goes into 2550 4 times with a remainder of 330.
Write down 4 as next digit of the result. 
Result so far: 145264.0
If we subtract 2220 from 2550, we get 330.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3300, and continue the process.

Moving on to step 9:
555 can be fit into 3300 5 times, resulting in a remainder of 525.
Use 5 as the next digit of our solution. 
Result so far: 145264.5
Deduct 2775 from 3300 and we're left with 525.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5250, and continue the process.

Let's proceed to step 10:
555 can be fit into 5250 9 times, resulting in a remainder of 255.
Put 9 as the next digit of the answer. 
Result so far: 145264.59
If we subtract 4995 from 5250, we get 255.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2550, and continue the process.

Going ahead to step 11:
555 goes into 2550 4 times with a remainder of 330.
Write down 4 as next digit of the result. 
Result so far: 145264.594
Subtracting 2220 from 2550 leaves us with 330.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3300, and continue the process.

Moving on to step 12:
555 can be fit into 3300 5 times, resulting in a remainder of 525.
The number 5 becomes the next digit in our result. 
Result so far: 145264.5945
Subtracting 2775 from 3300 leaves us with 525.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5250, and continue the process.

On to step 13:
When dividing 5250 by 555, we get 9 with a remainder of 255.
The next digit of our result is 9. 
Result so far: 145264.59459
If we take 4995 away from 5250, 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.

Advancing to step 14:
555 can be fit into 2550 4 times, resulting in a remainder of 330.
Use 4 as the next digit of our solution. 
Result so far: 145264.594594
Subtracting 2220 from 2550 leaves us with 330.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3300, and continue the process.

Step 15:
555 goes into 3300 5 times with a remainder of 525.
The number 5 becomes the next digit in our result. 
Result so far: 145264.5945945
If we subtract 2775 from 3300, we get 525.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5250, and continue the process.

Advancing to step 16:
If we divide 5250 by 555, we get 9 and a remainder of 255.
The next digit of our result is 9. 
Result so far: 145264.59459459
If we subtract 4995 from 5250, we get 255.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2550, and continue the process.

After the division, we end up with 145264.59459459 and a remainder of 2.55e-07.