30357992 ÷ 138 
The aim is to understand the frequency of 138 in 30357992.

Going ahead to step 1:
138 can be fit into 3 0 times, resulting in a remainder of 3.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 3, we get 3.
Take the next digit (0) from the dividend and append it to 3, then repeat: 30 / 138

On to step 2:
138 can be fit into 30 0 times, resulting in a remainder of 30.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 30 and we're left with 30.
Grab the next digit (3) from the dividend, add it to 30, then carry on: 303 / 138

Moving on to step 3:
When dividing 303 by 138, we get 2 with a remainder of 27.
Record the quotient 2 as the next digit in the result. 
Result so far: 2.0
The remainder is 27 after subtracting 276 from 303.
Fetch the next digit (5) from the dividend, attach it to 27 and continue: 275 / 138

Let's proceed to step 4:
138 can be fit into 275 1 times, resulting in a remainder of 137.
Record the quotient 1 as the next digit in the result. 
Result so far: 21.0
If we subtract 138 from 275, we get 137.
Append the next digit (7) from the dividend to 137 and continue with: 1377 / 138

Advancing to step 5:
138 can be fit into 1377 9 times, resulting in a remainder of 135.
Use 9 as the next digit of our solution. 
Result so far: 219.0
If we take 1242 away from 1377, we end up with 135.
Grab the next digit (9) from the dividend, add it to 135, then carry on: 1359 / 138

On to step 6:
If we divide 1359 by 138, we get 9 and a remainder of 117.
The number 9 becomes the next digit in our result. 
Result so far: 2199.0
If we subtract 1242 from 1359, we get 117.
Fetch the next digit (9) from the dividend, attach it to 117 and continue: 1179 / 138

Step 7:
138 can be fit into 1179 8 times, resulting in a remainder of 75.
Write down 8 as next digit of the result. 
Result so far: 21998.0
Deduct 1104 from 1179 and we're left with 75.
Take the next digit (2) from the dividend and append it to 75, then repeat: 752 / 138

Going ahead to step 8:
138 can be fit into 752 5 times, resulting in a remainder of 62.
Write down 5 as next digit of the result. 
Result so far: 219985.0
Subtract 690 from 752 to get 62.
Since there are no more digits in the dividend, we add a zero to the remainder making it 620, and continue the process.

Step 9:
138 goes into 620 4 times with a remainder of 68.
Put 4 as the next digit of the answer. 
Result so far: 219985.4
Subtract 552 from 620 to 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.

Step 10:
When dividing 680 by 138, we get 4 with a remainder of 128.
Put 4 as the next digit of the answer. 
Result so far: 219985.44
If we take 552 away from 680, we end up with 128.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1280, and continue the process.

The quotient of the division is 219985.44, and the remainder is 0.128.