We look at the division of 42169621 by 263 
The aim is to understand the frequency of 263 in 42169621.

Moving on to step 1:
When dividing 4 by 263, we get 0 with a remainder of 4.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 4 to get 4.
Take the next digit (2) from the dividend and append it to 4, then repeat: 42 / 263

On to step 2:
The number 263 fits into 42 0 times, leaving a remainder of 42.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 42 after subtracting 0 from 42.
Include the next digit (1) from the dividend after 42, then repeat: 421 / 263

Step 3:
The number 263 fits into 421 1 times, leaving a remainder of 158.
Put 1 as the next digit of the answer. 
Result so far: 1.0
Subtract 263 from 421 to get 158.
Fetch the next digit (6) from the dividend, attach it to 158 and continue: 1586 / 263

Going ahead to step 4:
The number 263 fits into 1586 6 times, leaving a remainder of 8.
Put 6 as the next digit of the answer. 
Result so far: 16.0
If we subtract 1578 from 1586, we get 8.
Include the next digit (9) from the dividend after 8, then repeat: 89 / 263

Advancing to step 5:
263 can be fit into 89 0 times, resulting in a remainder of 89.
Put 0 as the next digit of the answer. 
Result so far: 160.0
If we take 0 away from 89, we end up with 89.
Grab the next digit (6) from the dividend, add it to 89, then carry on: 896 / 263

Let's proceed to step 6:
263 goes into 896 3 times with a remainder of 107.
Put 3 as the next digit of the answer. 
Result so far: 1603.0
Subtract 789 from 896 to get 107.
Append the next digit (2) from the dividend to 107 and continue with: 1072 / 263

On to step 7:
If we divide 1072 by 263, we get 4 and a remainder of 20.
The number 4 becomes the next digit in our result. 
Result so far: 16034.0
The remainder is 20 after subtracting 1052 from 1072.
Bring next digit (1) of the dividend behind the 20 and repeat the process: 201 / 263

Step 8:
When dividing 201 by 263, we get 0 with a remainder of 201.
Write down 0 as next digit of the result. 
Result so far: 160340.0
Deduct 0 from 201 and we're left with 201.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2010, and continue the process.

Moving on to step 9:
263 can be fit into 2010 7 times, resulting in a remainder of 169.
The next digit of our result is 7. 
Result so far: 160340.7
If we take 1841 away from 2010, we end up with 169.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1690, and continue the process.

Advancing to step 10:
If we divide 1690 by 263, we get 6 and a remainder of 112.
The number 6 becomes the next digit in our result. 
Result so far: 160340.76
If we subtract 1578 from 1690, we get 112.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1120, and continue the process.

Moving on to step 11:
263 can be fit into 1120 4 times, resulting in a remainder of 68.
Put 4 as the next digit of the answer. 
Result so far: 160340.764
If we subtract 1052 from 1120, we get 68.
Since there are no more digits in the dividend, we add a zero to the remainder making it 680, and continue the process.

Advancing to step 12:
The number 263 fits into 680 2 times, leaving a remainder of 154.
Use 2 as the next digit of our solution. 
Result so far: 160340.7642
Subtract 526 from 680 to get 154.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1540, and continue the process.

Step 13:
1540 divided by 263 is 5 with a remainder of 225.
The number 5 becomes the next digit in our result. 
Result so far: 160340.76425
The remainder is 225 after subtracting 1315 from 1540.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2250, and continue the process.

Let's proceed to step 14:
When dividing 2250 by 263, we get 8 with a remainder of 146.
Put 8 as the next digit of the answer. 
Result so far: 160340.764258
Subtracting 2104 from 2250 leaves us with 146.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1460, and continue the process.

Advancing to step 15:
The number 263 fits into 1460 5 times, leaving a remainder of 145.
The number 5 becomes the next digit in our result. 
Result so far: 160340.7642585
Deduct 1315 from 1460 and we're left with 145.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1450, and continue the process.

Moving on to step 16:
263 can be fit into 1450 5 times, resulting in a remainder of 135.
The next digit of our result is 5. 
Result so far: 160340.76425855
Deduct 1315 from 1450 and we're left with 135.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1350, and continue the process.

The final result is 160340.76425855 with a remainder of 1.35e-07.