We look at the division of 43497402 by 878 
The aim is to understand the frequency of 878 in 43497402.

Step 1:
878 can be fit into 4 0 times, resulting in a remainder of 4.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 4 and we're left with 4.
Bring next digit (3) of the dividend behind the 4 and repeat the process: 43 / 878

On to step 2:
43 divided by 878 is 0 with a remainder of 43.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 43 after subtracting 0 from 43.
Include the next digit (4) from the dividend after 43, then repeat: 434 / 878

Step 3:
The number 878 fits into 434 0 times, leaving a remainder of 434.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 434 after subtracting 0 from 434.
Fetch the next digit (9) from the dividend, attach it to 434 and continue: 4349 / 878

Moving on to step 4:
The number 878 fits into 4349 4 times, leaving a remainder of 837.
Use 4 as the next digit of our solution. 
Result so far: 4.0
If we subtract 3512 from 4349, we get 837.
Grab the next digit (7) from the dividend, add it to 837, then carry on: 8377 / 878

Going ahead to step 5:
878 goes into 8377 9 times with a remainder of 475.
Record the quotient 9 as the next digit in the result. 
Result so far: 49.0
If we take 7902 away from 8377, we end up with 475.
Grab the next digit (4) from the dividend, add it to 475, then carry on: 4754 / 878

Advancing to step 6:
878 goes into 4754 5 times with a remainder of 364.
The number 5 becomes the next digit in our result. 
Result so far: 495.0
The remainder is 364 after subtracting 4390 from 4754.
Bring next digit (0) of the dividend behind the 364 and repeat the process: 3640 / 878

Advancing to step 7:
The number 878 fits into 3640 4 times, leaving a remainder of 128.
Write down 4 as next digit of the result. 
Result so far: 4954.0
If we take 3512 away from 3640, we end up with 128.
Include the next digit (2) from the dividend after 128, then repeat: 1282 / 878

Going ahead to step 8:
878 goes into 1282 1 times with a remainder of 404.
Put 1 as the next digit of the answer. 
Result so far: 49541.0
Subtracting 878 from 1282 leaves us with 404.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4040, and continue the process.

Going ahead to step 9:
The number 878 fits into 4040 4 times, leaving a remainder of 528.
Use 4 as the next digit of our solution. 
Result so far: 49541.4
If we subtract 3512 from 4040, we get 528.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5280, and continue the process.

On to step 10:
When dividing 5280 by 878, we get 6 with a remainder of 12.
Record the quotient 6 as the next digit in the result. 
Result so far: 49541.46
Subtracting 5268 from 5280 leaves us with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Advancing to step 11:
120 divided by 878 is 0 with a remainder of 120.
The number 0 becomes the next digit in our result. 
Result so far: 49541.46
The remainder is 120 after subtracting 0 from 120.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1200, and continue the process.

Going ahead to step 12:
If we divide 1200 by 878, we get 1 and a remainder of 322.
Put 1 as the next digit of the answer. 
Result so far: 49541.4601
Subtract 878 from 1200 to get 322.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3220, and continue the process.

Step 13:
878 can be fit into 3220 3 times, resulting in a remainder of 586.
The next digit of our result is 3. 
Result so far: 49541.46013
If we subtract 2634 from 3220, we get 586.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5860, and continue the process.

Advancing to step 14:
878 can be fit into 5860 6 times, resulting in a remainder of 592.
Put 6 as the next digit of the answer. 
Result so far: 49541.460136
Subtract 5268 from 5860 to get 592.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5920, and continue the process.

Going ahead to step 15:
5920 divided by 878 is 6 with a remainder of 652.
Record the quotient 6 as the next digit in the result. 
Result so far: 49541.4601366
Subtracting 5268 from 5920 leaves us with 652.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6520, and continue the process.

The quotient of the division is 49541.4601366, and the remainder is 6.52e-06.