We look at the division of 55134400 by 138 
The aim is to understand the frequency of 138 in 55134400.

On to step 1:
The number 138 fits into 5 0 times, leaving a remainder of 5.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 5 leaves us with 5.
Take the next digit (5) from the dividend and append it to 5, then repeat: 55 / 138

Step 2:
The number 138 fits into 55 0 times, leaving a remainder of 55.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 55 leaves us with 55.
Bring next digit (1) of the dividend behind the 55 and repeat the process: 551 / 138

Going ahead to step 3:
551 divided by 138 is 3 with a remainder of 137.
The next digit of our result is 3. 
Result so far: 3.0
Deduct 414 from 551 and we're left with 137.
Fetch the next digit (3) from the dividend, attach it to 137 and continue: 1373 / 138

Advancing to step 4:
When dividing 1373 by 138, we get 9 with a remainder of 131.
The number 9 becomes the next digit in our result. 
Result so far: 39.0
If we subtract 1242 from 1373, we get 131.
Grab the next digit (4) from the dividend, add it to 131, then carry on: 1314 / 138

On to step 5:
1314 divided by 138 is 9 with a remainder of 72.
Use 9 as the next digit of our solution. 
Result so far: 399.0
If we take 1242 away from 1314, we end up with 72.
Include the next digit (4) from the dividend after 72, then repeat: 724 / 138

Going ahead to step 6:
724 divided by 138 is 5 with a remainder of 34.
Record the quotient 5 as the next digit in the result. 
Result so far: 3995.0
The remainder is 34 after subtracting 690 from 724.
Grab the next digit (0) from the dividend, add it to 34, then carry on: 340 / 138

Let's proceed to step 7:
138 can be fit into 340 2 times, resulting in a remainder of 64.
The number 2 becomes the next digit in our result. 
Result so far: 39952.0
Subtracting 276 from 340 leaves us with 64.
Grab the next digit (0) from the dividend, add it to 64, then carry on: 640 / 138

Going ahead to step 8:
When dividing 640 by 138, we get 4 with a remainder of 88.
The next digit of our result is 4. 
Result so far: 399524.0
If we take 552 away from 640, we end up with 88.
Since there are no more digits in the dividend, we add a zero to the remainder making it 880, and continue the process.

Moving on to step 9:
138 can be fit into 880 6 times, resulting in a remainder of 52.
Put 6 as the next digit of the answer. 
Result so far: 399524.6
The remainder is 52 after subtracting 828 from 880.
Since there are no more digits in the dividend, we add a zero to the remainder making it 520, and continue the process.

On to step 10:
The number 138 fits into 520 3 times, leaving a remainder of 106.
Use 3 as the next digit of our solution. 
Result so far: 399524.63
If we take 414 away from 520, we end up with 106.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1060, and continue the process.

On to step 11:
138 goes into 1060 7 times with a remainder of 94.
The number 7 becomes the next digit in our result. 
Result so far: 399524.637
If we subtract 966 from 1060, we get 94.
Since there are no more digits in the dividend, we add a zero to the remainder making it 940, and continue the process.

Advancing to step 12:
The number 138 fits into 940 6 times, leaving a remainder of 112.
Record the quotient 6 as the next digit in the result. 
Result so far: 399524.6376
If we subtract 828 from 940, 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.

Step 13:
138 goes into 1120 8 times with a remainder of 16.
Use 8 as the next digit of our solution. 
Result so far: 399524.63768
The remainder is 16 after subtracting 1104 from 1120.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Advancing to step 14:
When dividing 160 by 138, we get 1 with a remainder of 22.
Write down 1 as next digit of the result. 
Result so far: 399524.637681
If we take 138 away from 160, we end up with 22.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

Going ahead to step 15:
138 goes into 220 1 times with a remainder of 82.
Record the quotient 1 as the next digit in the result. 
Result so far: 399524.6376811
Subtract 138 from 220 to get 82.
Since there are no more digits in the dividend, we add a zero to the remainder making it 820, and continue the process.

The final result is 399524.6376811 with a remainder of 8.2e-07.