Let's divide 13921874 by 388
The aim is to understand the frequency of 388 in 13921874.

Advancing to step 1:
The number 388 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 subtract 0 from 1, we get 1.
Include the next digit (3) from the dividend after 1, then repeat: 13 / 388

Advancing to step 2:
When dividing 13 by 388, we get 0 with a remainder of 13.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 13 leaves us with 13.
Take the next digit (9) from the dividend and append it to 13, then repeat: 139 / 388

On to step 3:
If we divide 139 by 388, we get 0 and a remainder of 139.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 139 after subtracting 0 from 139.
Take the next digit (2) from the dividend and append it to 139, then repeat: 1392 / 388

Going ahead to step 4:
When dividing 1392 by 388, we get 3 with a remainder of 228.
The number 3 becomes the next digit in our result. 
Result so far: 3.0
If we take 1164 away from 1392, we end up with 228.
Fetch the next digit (1) from the dividend, attach it to 228 and continue: 2281 / 388

On to step 5:
2281 divided by 388 is 5 with a remainder of 341.
The next digit of our result is 5. 
Result so far: 35.0
Subtract 1940 from 2281 to get 341.
Grab the next digit (8) from the dividend, add it to 341, then carry on: 3418 / 388

Going ahead to step 6:
388 can be fit into 3418 8 times, resulting in a remainder of 314.
Use 8 as the next digit of our solution. 
Result so far: 358.0
Deduct 3104 from 3418 and we're left with 314.
Grab the next digit (7) from the dividend, add it to 314, then carry on: 3147 / 388

Step 7:
If we divide 3147 by 388, we get 8 and a remainder of 43.
Record the quotient 8 as the next digit in the result. 
Result so far: 3588.0
Deduct 3104 from 3147 and we're left with 43.
Append the next digit (4) from the dividend to 43 and continue with: 434 / 388

Let's proceed to step 8:
388 goes into 434 1 times with a remainder of 46.
Put 1 as the next digit of the answer. 
Result so far: 35881.0
Subtracting 388 from 434 leaves us with 46.
Since there are no more digits in the dividend, we add a zero to the remainder making it 460, and continue the process.

Going ahead to step 9:
388 goes into 460 1 times with a remainder of 72.
Write down 1 as next digit of the result. 
Result so far: 35881.1
The remainder is 72 after subtracting 388 from 460.
Since there are no more digits in the dividend, we add a zero to the remainder making it 720, and continue the process.

Step 10:
If we divide 720 by 388, we get 1 and a remainder of 332.
Write down 1 as next digit of the result. 
Result so far: 35881.11
Deduct 388 from 720 and we're left with 332.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3320, and continue the process.

The final outcome is 35881.11, with a leftover of 0.332.