905800 ÷ 23 
The aim is to understand the frequency of 23 in 905800.

On to step 1:
23 goes into 9 0 times with a remainder of 9.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 9 after subtracting 0 from 9.
Append the next digit (0) from the dividend to 9 and continue with: 90 / 23

Going ahead to step 2:
If we divide 90 by 23, we get 3 and a remainder of 21.
Put 3 as the next digit of the answer. 
Result so far: 3.0
Subtracting 69 from 90 leaves us with 21.
Append the next digit (5) from the dividend to 21 and continue with: 215 / 23

Step 3:
23 goes into 215 9 times with a remainder of 8.
Use 9 as the next digit of our solution. 
Result so far: 39.0
The remainder is 8 after subtracting 207 from 215.
Take the next digit (8) from the dividend and append it to 8, then repeat: 88 / 23

Step 4:
23 goes into 88 3 times with a remainder of 19.
The number 3 becomes the next digit in our result. 
Result so far: 393.0
Deduct 69 from 88 and we're left with 19.
Bring next digit (0) of the dividend behind the 19 and repeat the process: 190 / 23

Advancing to step 5:
The number 23 fits into 190 8 times, leaving a remainder of 6.
The number 8 becomes the next digit in our result. 
Result so far: 3938.0
Deduct 184 from 190 and we're left with 6.
Grab the next digit (0) from the dividend, add it to 6, then carry on: 60 / 23

Step 6:
If we divide 60 by 23, we get 2 and a remainder of 14.
The number 2 becomes the next digit in our result. 
Result so far: 39382.0
Subtracting 46 from 60 leaves us with 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

Step 7:
If we divide 140 by 23, we get 6 and a remainder of 2.
Record the quotient 6 as the next digit in the result. 
Result so far: 39382.6
If we subtract 138 from 140, we get 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Going ahead to step 8:
When dividing 20 by 23, we get 0 with a remainder of 20.
Put 0 as the next digit of the answer. 
Result so far: 39382.6
Deduct 0 from 20 and we're left 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.

Step 9:
The number 23 fits into 200 8 times, leaving a remainder of 16.
Record the quotient 8 as the next digit in the result. 
Result so far: 39382.608
If we take 184 away from 200, we end up 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.

Step 10:
When dividing 160 by 23, we get 6 with a remainder of 22.
Record the quotient 6 as the next digit in the result. 
Result so far: 39382.6086
If we subtract 138 from 160, we get 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 11:
23 goes into 220 9 times with a remainder of 13.
Use 9 as the next digit of our solution. 
Result so far: 39382.60869
If we subtract 207 from 220, we get 13.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

Step 12:
23 goes into 130 5 times with a remainder of 15.
Use 5 as the next digit of our solution. 
Result so far: 39382.608695
The remainder is 15 after subtracting 115 from 130.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

Advancing to step 13:
150 divided by 23 is 6 with a remainder of 12.
Use 6 as the next digit of our solution. 
Result so far: 39382.6086956
The remainder is 12 after subtracting 138 from 150.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Moving on to step 14:
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: 39382.60869565
Subtract 115 from 120 to get 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

After the division, we end up with 39382.60869565 and a remainder of 5e-09.