3758989 ÷ 138 
The aim is to understand the frequency of 138 in 3758989.

Advancing to step 1:
138 can be fit into 3 0 times, resulting in a remainder of 3.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 3 and we're left with 3.
Include the next digit (7) from the dividend after 3, then repeat: 37 / 138

Step 2:
If we divide 37 by 138, we get 0 and a remainder of 37.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 37 to get 37.
Bring next digit (5) of the dividend behind the 37 and repeat the process: 375 / 138

On to step 3:
375 divided by 138 is 2 with a remainder of 99.
Put 2 as the next digit of the answer. 
Result so far: 2.0
If we take 276 away from 375, we end up with 99.
Append the next digit (8) from the dividend to 99 and continue with: 998 / 138

Going ahead to step 4:
The number 138 fits into 998 7 times, leaving a remainder of 32.
Record the quotient 7 as the next digit in the result. 
Result so far: 27.0
The remainder is 32 after subtracting 966 from 998.
Append the next digit (9) from the dividend to 32 and continue with: 329 / 138

Going ahead to step 5:
When dividing 329 by 138, we get 2 with a remainder of 53.
Record the quotient 2 as the next digit in the result. 
Result so far: 272.0
If we take 276 away from 329, we end up with 53.
Include the next digit (8) from the dividend after 53, then repeat: 538 / 138

On to step 6:
When dividing 538 by 138, we get 3 with a remainder of 124.
The number 3 becomes the next digit in our result. 
Result so far: 2723.0
The remainder is 124 after subtracting 414 from 538.
Take the next digit (9) from the dividend and append it to 124, then repeat: 1249 / 138

Step 7:
138 can be fit into 1249 9 times, resulting in a remainder of 7.
The next digit of our result is 9. 
Result so far: 27239.0
Subtract 1242 from 1249 to get 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

On to step 8:
138 can be fit into 70 0 times, resulting in a remainder of 70.
Write down 0 as next digit of the result. 
Result so far: 27239.0
Subtracting 0 from 70 leaves us with 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

Step 9:
138 goes into 700 5 times with a remainder of 10.
Write down 5 as next digit of the result. 
Result so far: 27239.05
If we subtract 690 from 700, we get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Advancing to step 10:
If we divide 100 by 138, we get 0 and a remainder of 100.
Put 0 as the next digit of the answer. 
Result so far: 27239.05
Deduct 0 from 100 and we're left with 100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1000, and continue the process.

Step 11:
138 goes into 1000 7 times with a remainder of 34.
The number 7 becomes the next digit in our result. 
Result so far: 27239.0507
Subtract 966 from 1000 to get 34.
Since there are no more digits in the dividend, we add a zero to the remainder making it 340, and continue the process.

Going ahead to step 12:
138 can be fit into 340 2 times, resulting in a remainder of 64.
The next digit of our result is 2. 
Result so far: 27239.05072
If we subtract 276 from 340, we get 64.
Since there are no more digits in the dividend, we add a zero to the remainder making it 640, and continue the process.

Moving on to step 13:
640 divided by 138 is 4 with a remainder of 88.
Record the quotient 4 as the next digit in the result. 
Result so far: 27239.050724
Subtract 552 from 640 to get 88.
Since there are no more digits in the dividend, we add a zero to the remainder making it 880, and continue the process.

Let's proceed to step 14:
When dividing 880 by 138, we get 6 with a remainder of 52.
The next digit of our result is 6. 
Result so far: 27239.0507246
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.

Let's proceed to step 15:
When dividing 520 by 138, we get 3 with a remainder of 106.
The next digit of our result is 3. 
Result so far: 27239.05072463
Subtracting 414 from 520 leaves us 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.

The final result is 27239.05072463 with a remainder of 1.06e-07.