We look at the division of 879816 by 23 
The aim is to understand the frequency of 23 in 879816.

Going ahead to step 1:
23 can be fit into 8 0 times, resulting in a remainder of 8.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 8, we end up with 8.
Fetch the next digit (7) from the dividend, attach it to 8 and continue: 87 / 23

Moving on to step 2:
87 divided by 23 is 3 with a remainder of 18.
Record the quotient 3 as the next digit in the result. 
Result so far: 3.0
If we take 69 away from 87, we end up with 18.
Take the next digit (9) from the dividend and append it to 18, then repeat: 189 / 23

Step 3:
If we divide 189 by 23, we get 8 and a remainder of 5.
The number 8 becomes the next digit in our result. 
Result so far: 38.0
Deduct 184 from 189 and we're left with 5.
Grab the next digit (8) from the dividend, add it to 5, then carry on: 58 / 23

Moving on to step 4:
The number 23 fits into 58 2 times, leaving a remainder of 12.
The number 2 becomes the next digit in our result. 
Result so far: 382.0
Subtract 46 from 58 to get 12.
Grab the next digit (1) from the dividend, add it to 12, then carry on: 121 / 23

Let's proceed to step 5:
When dividing 121 by 23, we get 5 with a remainder of 6.
Put 5 as the next digit of the answer. 
Result so far: 3825.0
If we take 115 away from 121, we end up with 6.
Fetch the next digit (6) from the dividend, attach it to 6 and continue: 66 / 23

Moving on to step 6:
23 goes into 66 2 times with a remainder of 20.
Put 2 as the next digit of the answer. 
Result so far: 38252.0
If we take 46 away from 66, we end up with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Going ahead to step 7:
When dividing 200 by 23, we get 8 with a remainder of 16.
The next digit of our result is 8. 
Result so far: 38252.8
Deduct 184 from 200 and we're left with 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Moving on to step 8:
When dividing 160 by 23, we get 6 with a remainder of 22.
Write down 6 as next digit of the result. 
Result so far: 38252.86
Deduct 138 from 160 and we're left with 22.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

On to step 9:
23 goes into 220 9 times with a remainder of 13.
Record the quotient 9 as the next digit in the result. 
Result so far: 38252.869
If we take 207 away from 220, we end up with 13.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

On to step 10:
If we divide 130 by 23, we get 5 and a remainder of 15.
Record the quotient 5 as the next digit in the result. 
Result so far: 38252.8695
Subtract 115 from 130 to get 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

On to step 11:
150 divided by 23 is 6 with a remainder of 12.
Put 6 as the next digit of the answer. 
Result so far: 38252.86956
If we take 138 away from 150, we end up 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.

Let's proceed to step 12:
23 can be fit into 120 5 times, resulting in a remainder of 5.
Put 5 as the next digit of the answer. 
Result so far: 38252.869565
The remainder is 5 after subtracting 115 from 120.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

On to step 13:
50 divided by 23 is 2 with a remainder of 4.
The number 2 becomes the next digit in our result. 
Result so far: 38252.8695652
Subtract 46 from 50 to get 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Let's proceed to step 14:
When dividing 40 by 23, we get 1 with a remainder of 17.
Use 1 as the next digit of our solution. 
Result so far: 38252.86956521
Subtract 23 from 40 to get 17.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

The final result is 38252.86956521 with a remainder of 1.7e-08.