We look at the division of 6851197 by 873 
The aim is to understand the frequency of 873 in 6851197.

Advancing to step 1:
The number 873 fits into 6 0 times, leaving a remainder of 6.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 6 to get 6.
Grab the next digit (8) from the dividend, add it to 6, then carry on: 68 / 873

Going ahead to step 2:
873 can be fit into 68 0 times, resulting in a remainder of 68.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 68 to get 68.
Append the next digit (5) from the dividend to 68 and continue with: 685 / 873

Moving on to step 3:
873 can be fit into 685 0 times, resulting in a remainder of 685.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 685, we get 685.
Grab the next digit (1) from the dividend, add it to 685, then carry on: 6851 / 873

Step 4:
873 goes into 6851 7 times with a remainder of 740.
Use 7 as the next digit of our solution. 
Result so far: 7.0
Subtract 6111 from 6851 to get 740.
Grab the next digit (1) from the dividend, add it to 740, then carry on: 7401 / 873

Advancing to step 5:
873 can be fit into 7401 8 times, resulting in a remainder of 417.
The number 8 becomes the next digit in our result. 
Result so far: 78.0
If we subtract 6984 from 7401, we get 417.
Take the next digit (9) from the dividend and append it to 417, then repeat: 4179 / 873

Step 6:
The number 873 fits into 4179 4 times, leaving a remainder of 687.
Use 4 as the next digit of our solution. 
Result so far: 784.0
If we take 3492 away from 4179, we end up with 687.
Grab the next digit (7) from the dividend, add it to 687, then carry on: 6877 / 873

Step 7:
6877 divided by 873 is 7 with a remainder of 766.
The next digit of our result is 7. 
Result so far: 7847.0
Subtracting 6111 from 6877 leaves us with 766.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7660, and continue the process.

Going ahead to step 8:
The number 873 fits into 7660 8 times, leaving a remainder of 676.
Use 8 as the next digit of our solution. 
Result so far: 7847.8
Deduct 6984 from 7660 and we're left with 676.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6760, and continue the process.

Advancing to step 9:
873 goes into 6760 7 times with a remainder of 649.
Write down 7 as next digit of the result. 
Result so far: 7847.87
Subtracting 6111 from 6760 leaves us with 649.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6490, and continue the process.

Moving on to step 10:
If we divide 6490 by 873, we get 7 and a remainder of 379.
The next digit of our result is 7. 
Result so far: 7847.877
If we take 6111 away from 6490, we end up with 379.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3790, and continue the process.

The quotient of the division is 7847.877, and the remainder is 0.0379.