We look at the division of 43406485 by 387 
The aim is to understand the frequency of 387 in 43406485.

On to step 1:
387 can be fit into 4 0 times, resulting in a remainder of 4.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 4, we get 4.
Append the next digit (3) from the dividend to 4 and continue with: 43 / 387

Let's proceed to step 2:
387 goes into 43 0 times with a remainder of 43.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 43 leaves us with 43.
Fetch the next digit (4) from the dividend, attach it to 43 and continue: 434 / 387

Advancing to step 3:
434 divided by 387 is 1 with a remainder of 47.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
If we subtract 387 from 434, we get 47.
Grab the next digit (0) from the dividend, add it to 47, then carry on: 470 / 387

Step 4:
470 divided by 387 is 1 with a remainder of 83.
Use 1 as the next digit of our solution. 
Result so far: 11.0
If we take 387 away from 470, we end up with 83.
Append the next digit (6) from the dividend to 83 and continue with: 836 / 387

Going ahead to step 5:
387 goes into 836 2 times with a remainder of 62.
The next digit of our result is 2. 
Result so far: 112.0
Subtracting 774 from 836 leaves us with 62.
Include the next digit (4) from the dividend after 62, then repeat: 624 / 387

Moving on to step 6:
The number 387 fits into 624 1 times, leaving a remainder of 237.
Write down 1 as next digit of the result. 
Result so far: 1121.0
Deduct 387 from 624 and we're left with 237.
Grab the next digit (8) from the dividend, add it to 237, then carry on: 2378 / 387

On to step 7:
If we divide 2378 by 387, we get 6 and a remainder of 56.
The next digit of our result is 6. 
Result so far: 11216.0
Subtract 2322 from 2378 to get 56.
Grab the next digit (5) from the dividend, add it to 56, then carry on: 565 / 387

On to step 8:
565 divided by 387 is 1 with a remainder of 178.
The number 1 becomes the next digit in our result. 
Result so far: 112161.0
Subtract 387 from 565 to get 178.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1780, and continue the process.

Advancing to step 9:
If we divide 1780 by 387, we get 4 and a remainder of 232.
Write down 4 as next digit of the result. 
Result so far: 112161.4
If we take 1548 away from 1780, we end up with 232.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2320, and continue the process.

Step 10:
387 goes into 2320 5 times with a remainder of 385.
The next digit of our result is 5. 
Result so far: 112161.45
The remainder is 385 after subtracting 1935 from 2320.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3850, and continue the process.

Let's proceed to step 11:
The number 387 fits into 3850 9 times, leaving a remainder of 367.
Write down 9 as next digit of the result. 
Result so far: 112161.459
If we subtract 3483 from 3850, we get 367.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3670, and continue the process.

On to step 12:
When dividing 3670 by 387, we get 9 with a remainder of 187.
Use 9 as the next digit of our solution. 
Result so far: 112161.4599
Deduct 3483 from 3670 and we're left with 187.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1870, and continue the process.

In conclusion, the division gives 112161.4599 with a balance of 0.00187.