17633815 ÷ 438 
The aim is to understand the frequency of 438 in 17633815.

Step 1:
The number 438 fits into 1 0 times, leaving a remainder of 1.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 1, we end up with 1.
Take the next digit (7) from the dividend and append it to 1, then repeat: 17 / 438

Let's proceed to step 2:
If we divide 17 by 438, we get 0 and a remainder of 17.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 17, we end up with 17.
Include the next digit (6) from the dividend after 17, then repeat: 176 / 438

On to step 3:
When dividing 176 by 438, we get 0 with a remainder of 176.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 176 to get 176.
Grab the next digit (3) from the dividend, add it to 176, then carry on: 1763 / 438

Let's proceed to step 4:
If we divide 1763 by 438, we get 4 and a remainder of 11.
Use 4 as the next digit of our solution. 
Result so far: 4.0
The remainder is 11 after subtracting 1752 from 1763.
Append the next digit (3) from the dividend to 11 and continue with: 113 / 438

Going ahead to step 5:
When dividing 113 by 438, we get 0 with a remainder of 113.
Record the quotient 0 as the next digit in the result. 
Result so far: 40.0
Subtract 0 from 113 to get 113.
Grab the next digit (8) from the dividend, add it to 113, then carry on: 1138 / 438

Advancing to step 6:
The number 438 fits into 1138 2 times, leaving a remainder of 262.
The number 2 becomes the next digit in our result. 
Result so far: 402.0
If we take 876 away from 1138, we end up with 262.
Append the next digit (1) from the dividend to 262 and continue with: 2621 / 438

Let's proceed to step 7:
If we divide 2621 by 438, we get 5 and a remainder of 431.
Write down 5 as next digit of the result. 
Result so far: 4025.0
Subtract 2190 from 2621 to get 431.
Include the next digit (5) from the dividend after 431, then repeat: 4315 / 438

On to step 8:
When dividing 4315 by 438, we get 9 with a remainder of 373.
The next digit of our result is 9. 
Result so far: 40259.0
The remainder is 373 after subtracting 3942 from 4315.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3730, and continue the process.

Going ahead to step 9:
If we divide 3730 by 438, we get 8 and a remainder of 226.
The number 8 becomes the next digit in our result. 
Result so far: 40259.8
If we subtract 3504 from 3730, we get 226.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2260, and continue the process.

Advancing to step 10:
438 can be fit into 2260 5 times, resulting in a remainder of 70.
Put 5 as the next digit of the answer. 
Result so far: 40259.85
The remainder is 70 after subtracting 2190 from 2260.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

Let's proceed to step 11:
The number 438 fits into 700 1 times, leaving a remainder of 262.
The number 1 becomes the next digit in our result. 
Result so far: 40259.851
The remainder is 262 after subtracting 438 from 700.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2620, and continue the process.

Step 12:
If we divide 2620 by 438, we get 5 and a remainder of 430.
Use 5 as the next digit of our solution. 
Result so far: 40259.8515
If we take 2190 away from 2620, we end up with 430.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4300, and continue the process.

Advancing to step 13:
When dividing 4300 by 438, we get 9 with a remainder of 358.
Use 9 as the next digit of our solution. 
Result so far: 40259.85159
If we subtract 3942 from 4300, we get 358.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3580, and continue the process.

Step 14:
3580 divided by 438 is 8 with a remainder of 76.
The number 8 becomes the next digit in our result. 
Result so far: 40259.851598
The remainder is 76 after subtracting 3504 from 3580.
Since there are no more digits in the dividend, we add a zero to the remainder making it 760, and continue the process.

Step 15:
The number 438 fits into 760 1 times, leaving a remainder of 322.
The next digit of our result is 1. 
Result so far: 40259.8515981
If we subtract 438 from 760, we 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.

Moving on to step 16:
438 goes into 3220 7 times with a remainder of 154.
Write down 7 as next digit of the result. 
Result so far: 40259.85159817
Subtracting 3066 from 3220 leaves us with 154.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1540, and continue the process.

After the division, we end up with 40259.85159817 and a remainder of 1.54e-07.