We divide 7775963 by 855
The aim is to understand the frequency of 855 in 7775963.

On to step 1:
The number 855 fits into 7 0 times, leaving a remainder of 7.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 7 and we're left with 7.
Bring next digit (7) of the dividend behind the 7 and repeat the process: 77 / 855

Moving on to step 2:
77 divided by 855 is 0 with a remainder of 77.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 77 to get 77.
Fetch the next digit (7) from the dividend, attach it to 77 and continue: 777 / 855

Step 3:
855 can be fit into 777 0 times, resulting in a remainder of 777.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 777, we get 777.
Bring next digit (5) of the dividend behind the 777 and repeat the process: 7775 / 855

Advancing to step 4:
855 can be fit into 7775 9 times, resulting in a remainder of 80.
The next digit of our result is 9. 
Result so far: 9.0
Subtract 7695 from 7775 to get 80.
Include the next digit (9) from the dividend after 80, then repeat: 809 / 855

Step 5:
When dividing 809 by 855, we get 0 with a remainder of 809.
Use 0 as the next digit of our solution. 
Result so far: 90.0
If we take 0 away from 809, we end up with 809.
Grab the next digit (6) from the dividend, add it to 809, then carry on: 8096 / 855

Advancing to step 6:
When dividing 8096 by 855, we get 9 with a remainder of 401.
Write down 9 as next digit of the result. 
Result so far: 909.0
Subtracting 7695 from 8096 leaves us with 401.
Grab the next digit (3) from the dividend, add it to 401, then carry on: 4013 / 855

Advancing to step 7:
When dividing 4013 by 855, we get 4 with a remainder of 593.
Use 4 as the next digit of our solution. 
Result so far: 9094.0
Deduct 3420 from 4013 and we're left with 593.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5930, and continue the process.

Advancing to step 8:
855 goes into 5930 6 times with a remainder of 800.
Use 6 as the next digit of our solution. 
Result so far: 9094.6
Deduct 5130 from 5930 and we're left with 800.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8000, and continue the process.

Moving on to step 9:
When dividing 8000 by 855, we get 9 with a remainder of 305.
The number 9 becomes the next digit in our result. 
Result so far: 9094.69
Subtracting 7695 from 8000 leaves us with 305.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3050, and continue the process.

Step 10:
If we divide 3050 by 855, we get 3 and a remainder of 485.
Put 3 as the next digit of the answer. 
Result so far: 9094.693
If we subtract 2565 from 3050, we get 485.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4850, and continue the process.

Going ahead to step 11:
If we divide 4850 by 855, we get 5 and a remainder of 575.
Use 5 as the next digit of our solution. 
Result so far: 9094.6935
If we subtract 4275 from 4850, we get 575.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5750, and continue the process.

On to step 12:
855 can be fit into 5750 6 times, resulting in a remainder of 620.
Use 6 as the next digit of our solution. 
Result so far: 9094.69356
If we take 5130 away from 5750, we end up with 620.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6200, and continue the process.

On to step 13:
855 can be fit into 6200 7 times, resulting in a remainder of 215.
Use 7 as the next digit of our solution. 
Result so far: 9094.693567
Deduct 5985 from 6200 and we're left with 215.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2150, and continue the process.

Let's proceed to step 14:
855 goes into 2150 2 times with a remainder of 440.
Put 2 as the next digit of the answer. 
Result so far: 9094.6935672
If we take 1710 away from 2150, we end up with 440.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4400, and continue the process.

Moving on to step 15:
If we divide 4400 by 855, we get 5 and a remainder of 125.
The number 5 becomes the next digit in our result. 
Result so far: 9094.69356725
If we take 4275 away from 4400, we end up with 125.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1250, and continue the process.

The final outcome is 9094.69356725, with a leftover of 1.25e-07.