We look at the division of 87490923 by 387 
The aim is to understand the frequency of 387 in 87490923.

Advancing to step 1:
387 can be fit into 8 0 times, resulting in a remainder of 8.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 8 and we're left with 8.
Grab the next digit (7) from the dividend, add it to 8, then carry on: 87 / 387

Going ahead to step 2:
387 can be fit into 87 0 times, resulting in a remainder of 87.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 87, we get 87.
Include the next digit (4) from the dividend after 87, then repeat: 874 / 387

Going ahead to step 3:
874 divided by 387 is 2 with a remainder of 100.
Use 2 as the next digit of our solution. 
Result so far: 2.0
If we subtract 774 from 874, we get 100.
Fetch the next digit (9) from the dividend, attach it to 100 and continue: 1009 / 387

Moving on to step 4:
If we divide 1009 by 387, we get 2 and a remainder of 235.
The next digit of our result is 2. 
Result so far: 22.0
If we subtract 774 from 1009, we get 235.
Grab the next digit (0) from the dividend, add it to 235, then carry on: 2350 / 387

Moving on to step 5:
If we divide 2350 by 387, we get 6 and a remainder of 28.
Use 6 as the next digit of our solution. 
Result so far: 226.0
Subtract 2322 from 2350 to get 28.
Include the next digit (9) from the dividend after 28, then repeat: 289 / 387

Going ahead to step 6:
387 can be fit into 289 0 times, resulting in a remainder of 289.
Use 0 as the next digit of our solution. 
Result so far: 2260.0
Subtracting 0 from 289 leaves us with 289.
Append the next digit (2) from the dividend to 289 and continue with: 2892 / 387

Going ahead to step 7:
The number 387 fits into 2892 7 times, leaving a remainder of 183.
Write down 7 as next digit of the result. 
Result so far: 22607.0
Deduct 2709 from 2892 and we're left with 183.
Append the next digit (3) from the dividend to 183 and continue with: 1833 / 387

Advancing to step 8:
1833 divided by 387 is 4 with a remainder of 285.
The number 4 becomes the next digit in our result. 
Result so far: 226074.0
Deduct 1548 from 1833 and we're left with 285.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2850, and continue the process.

Step 9:
When dividing 2850 by 387, we get 7 with a remainder of 141.
The number 7 becomes the next digit in our result. 
Result so far: 226074.7
If we take 2709 away from 2850, we end up with 141.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1410, and continue the process.

Advancing to step 10:
If we divide 1410 by 387, we get 3 and a remainder of 249.
Use 3 as the next digit of our solution. 
Result so far: 226074.73
Subtracting 1161 from 1410 leaves us with 249.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2490, and continue the process.

Step 11:
387 can be fit into 2490 6 times, resulting in a remainder of 168.
Record the quotient 6 as the next digit in the result. 
Result so far: 226074.736
Subtract 2322 from 2490 to get 168.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1680, and continue the process.

Advancing to step 12:
The number 387 fits into 1680 4 times, leaving a remainder of 132.
Write down 4 as next digit of the result. 
Result so far: 226074.7364
Subtracting 1548 from 1680 leaves us with 132.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1320, and continue the process.

Let's proceed to step 13:
1320 divided by 387 is 3 with a remainder of 159.
The next digit of our result is 3. 
Result so far: 226074.73643
If we subtract 1161 from 1320, we get 159.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1590, and continue the process.

Step 14:
387 goes into 1590 4 times with a remainder of 42.
The number 4 becomes the next digit in our result. 
Result so far: 226074.736434
If we take 1548 away from 1590, we end up with 42.
Since there are no more digits in the dividend, we add a zero to the remainder making it 420, and continue the process.

Moving on to step 15:
If we divide 420 by 387, we get 1 and a remainder of 33.
Use 1 as the next digit of our solution. 
Result so far: 226074.7364341
Deduct 387 from 420 and we're left with 33.
Since there are no more digits in the dividend, we add a zero to the remainder making it 330, and continue the process.

On to step 16:
330 divided by 387 is 0 with a remainder of 330.
The number 0 becomes the next digit in our result. 
Result so far: 226074.7364341
If we take 0 away from 330, we end up with 330.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3300, and continue the process.

Our division results in 226074.7364341 with a remaining 3.3e-07.