51332285 ÷ 438 
The aim is to understand the frequency of 438 in 51332285.

Moving on to step 1:
438 goes into 5 0 times with a remainder of 5.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 5 and we're left with 5.
Grab the next digit (1) from the dividend, add it to 5, then carry on: 51 / 438

Let's proceed to step 2:
438 goes into 51 0 times with a remainder of 51.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 51, we end up with 51.
Include the next digit (3) from the dividend after 51, then repeat: 513 / 438

On to step 3:
If we divide 513 by 438, we get 1 and a remainder of 75.
Use 1 as the next digit of our solution. 
Result so far: 1.0
Subtracting 438 from 513 leaves us with 75.
Take the next digit (3) from the dividend and append it to 75, then repeat: 753 / 438

Advancing to step 4:
438 can be fit into 753 1 times, resulting in a remainder of 315.
The next digit of our result is 1. 
Result so far: 11.0
If we take 438 away from 753, we end up with 315.
Append the next digit (2) from the dividend to 315 and continue with: 3152 / 438

Advancing to step 5:
438 goes into 3152 7 times with a remainder of 86.
Record the quotient 7 as the next digit in the result. 
Result so far: 117.0
If we take 3066 away from 3152, we end up with 86.
Bring next digit (2) of the dividend behind the 86 and repeat the process: 862 / 438

Moving on to step 6:
The number 438 fits into 862 1 times, leaving a remainder of 424.
The number 1 becomes the next digit in our result. 
Result so far: 1171.0
Subtract 438 from 862 to get 424.
Fetch the next digit (8) from the dividend, attach it to 424 and continue: 4248 / 438

On to step 7:
4248 divided by 438 is 9 with a remainder of 306.
Use 9 as the next digit of our solution. 
Result so far: 11719.0
Deduct 3942 from 4248 and we're left with 306.
Append the next digit (5) from the dividend to 306 and continue with: 3065 / 438

On to step 8:
3065 divided by 438 is 6 with a remainder of 437.
The number 6 becomes the next digit in our result. 
Result so far: 117196.0
If we subtract 2628 from 3065, we get 437.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4370, and continue the process.

Step 9:
The number 438 fits into 4370 9 times, leaving a remainder of 428.
Write down 9 as next digit of the result. 
Result so far: 117196.9
Deduct 3942 from 4370 and we're left with 428.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4280, and continue the process.

Going ahead to step 10:
If we divide 4280 by 438, we get 9 and a remainder of 338.
Put 9 as the next digit of the answer. 
Result so far: 117196.99
If we take 3942 away from 4280, we end up with 338.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3380, and continue the process.

After the division, we end up with 117196.99 and a remainder of 0.338.