We look at the division of 78800345 by 877 
The aim is to understand the frequency of 877 in 78800345.

Step 1:
When dividing 7 by 877, we get 0 with a remainder of 7.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 7 leaves us with 7.
Append the next digit (8) from the dividend to 7 and continue with: 78 / 877

Going ahead to step 2:
877 goes into 78 0 times with a remainder of 78.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 78, we get 78.
Bring next digit (8) of the dividend behind the 78 and repeat the process: 788 / 877

Let's proceed to step 3:
877 goes into 788 0 times with a remainder of 788.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 788 to get 788.
Append the next digit (0) from the dividend to 788 and continue with: 7880 / 877

Moving on to step 4:
877 can be fit into 7880 8 times, resulting in a remainder of 864.
The next digit of our result is 8. 
Result so far: 8.0
Subtracting 7016 from 7880 leaves us with 864.
Append the next digit (0) from the dividend to 864 and continue with: 8640 / 877

Advancing to step 5:
877 can be fit into 8640 9 times, resulting in a remainder of 747.
Write down 9 as next digit of the result. 
Result so far: 89.0
Subtract 7893 from 8640 to get 747.
Include the next digit (3) from the dividend after 747, then repeat: 7473 / 877

Step 6:
If we divide 7473 by 877, we get 8 and a remainder of 457.
Put 8 as the next digit of the answer. 
Result so far: 898.0
If we take 7016 away from 7473, we end up with 457.
Bring next digit (4) of the dividend behind the 457 and repeat the process: 4574 / 877

Going ahead to step 7:
4574 divided by 877 is 5 with a remainder of 189.
Put 5 as the next digit of the answer. 
Result so far: 8985.0
Subtracting 4385 from 4574 leaves us with 189.
Fetch the next digit (5) from the dividend, attach it to 189 and continue: 1895 / 877

Step 8:
877 goes into 1895 2 times with a remainder of 141.
Use 2 as the next digit of our solution. 
Result so far: 89852.0
Subtract 1754 from 1895 to get 141.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1410, and continue the process.

Let's proceed to step 9:
877 goes into 1410 1 times with a remainder of 533.
The number 1 becomes the next digit in our result. 
Result so far: 89852.1
If we subtract 877 from 1410, we get 533.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5330, and continue the process.

On to step 10:
5330 divided by 877 is 6 with a remainder of 68.
Put 6 as the next digit of the answer. 
Result so far: 89852.16
If we take 5262 away from 5330, we end up with 68.
Since there are no more digits in the dividend, we add a zero to the remainder making it 680, and continue the process.

On to step 11:
680 divided by 877 is 0 with a remainder of 680.
Use 0 as the next digit of our solution. 
Result so far: 89852.16
If we take 0 away from 680, we end up with 680.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6800, and continue the process.

Advancing to step 12:
When dividing 6800 by 877, we get 7 with a remainder of 661.
Use 7 as the next digit of our solution. 
Result so far: 89852.1607
The remainder is 661 after subtracting 6139 from 6800.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6610, and continue the process.

Moving on to step 13:
The number 877 fits into 6610 7 times, leaving a remainder of 471.
Record the quotient 7 as the next digit in the result. 
Result so far: 89852.16077
The remainder is 471 after subtracting 6139 from 6610.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4710, and continue the process.

The final outcome is 89852.16077, with a leftover of 0.000471.