We look at the division of 80212011 by 878 
The aim is to understand the frequency of 878 in 80212011.

Let's proceed to step 1:
If we divide 8 by 878, we get 0 and a remainder of 8.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 8 and we're left with 8.
Take the next digit (0) from the dividend and append it to 8, then repeat: 80 / 878

Let's proceed to step 2:
When dividing 80 by 878, we get 0 with a remainder of 80.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 80, we get 80.
Include the next digit (2) from the dividend after 80, then repeat: 802 / 878

Advancing to step 3:
When dividing 802 by 878, we get 0 with a remainder of 802.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 802 to get 802.
Grab the next digit (1) from the dividend, add it to 802, then carry on: 8021 / 878

Step 4:
The number 878 fits into 8021 9 times, leaving a remainder of 119.
Put 9 as the next digit of the answer. 
Result so far: 9.0
Deduct 7902 from 8021 and we're left with 119.
Grab the next digit (2) from the dividend, add it to 119, then carry on: 1192 / 878

Advancing to step 5:
1192 divided by 878 is 1 with a remainder of 314.
Use 1 as the next digit of our solution. 
Result so far: 91.0
Subtracting 878 from 1192 leaves us with 314.
Take the next digit (0) from the dividend and append it to 314, then repeat: 3140 / 878

Step 6:
When dividing 3140 by 878, we get 3 with a remainder of 506.
Put 3 as the next digit of the answer. 
Result so far: 913.0
Deduct 2634 from 3140 and we're left with 506.
Append the next digit (1) from the dividend to 506 and continue with: 5061 / 878

Going ahead to step 7:
5061 divided by 878 is 5 with a remainder of 671.
Write down 5 as next digit of the result. 
Result so far: 9135.0
The remainder is 671 after subtracting 4390 from 5061.
Grab the next digit (1) from the dividend, add it to 671, then carry on: 6711 / 878

Let's proceed to step 8:
878 can be fit into 6711 7 times, resulting in a remainder of 565.
Record the quotient 7 as the next digit in the result. 
Result so far: 91357.0
Deduct 6146 from 6711 and we're left with 565.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5650, and continue the process.

Let's proceed to step 9:
The number 878 fits into 5650 6 times, leaving a remainder of 382.
Write down 6 as next digit of the result. 
Result so far: 91357.6
Deduct 5268 from 5650 and we're left with 382.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3820, and continue the process.

Advancing to step 10:
3820 divided by 878 is 4 with a remainder of 308.
Put 4 as the next digit of the answer. 
Result so far: 91357.64
If we subtract 3512 from 3820, we get 308.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3080, and continue the process.

Step 11:
When dividing 3080 by 878, we get 3 with a remainder of 446.
Put 3 as the next digit of the answer. 
Result so far: 91357.643
Deduct 2634 from 3080 and we're left with 446.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4460, and continue the process.

Moving on to step 12:
878 goes into 4460 5 times with a remainder of 70.
Record the quotient 5 as the next digit in the result. 
Result so far: 91357.6435
If we subtract 4390 from 4460, we get 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

Going ahead to step 13:
If we divide 700 by 878, we get 0 and a remainder of 700.
Use 0 as the next digit of our solution. 
Result so far: 91357.6435
If we take 0 away from 700, we end up with 700.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7000, and continue the process.

On to step 14:
If we divide 7000 by 878, we get 7 and a remainder of 854.
The next digit of our result is 7. 
Result so far: 91357.643507
Subtracting 6146 from 7000 leaves us with 854.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8540, and continue the process.

Moving on to step 15:
878 goes into 8540 9 times with a remainder of 638.
The number 9 becomes the next digit in our result. 
Result so far: 91357.6435079
If we take 7902 away from 8540, we end up with 638.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6380, and continue the process.

Advancing to step 16:
The number 878 fits into 6380 7 times, leaving a remainder of 234.
Write down 7 as next digit of the result. 
Result so far: 91357.64350797
The remainder is 234 after subtracting 6146 from 6380.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2340, and continue the process.

The final result is 91357.64350797 with a remainder of 2.34e-07.