We look at the division of 4345398 by 387 
The aim is to understand the frequency of 387 in 4345398.

Advancing to step 1:
4 divided by 387 is 0 with a remainder of 4.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 4 after subtracting 0 from 4.
Fetch the next digit (3) from the dividend, attach it to 4 and continue: 43 / 387

Step 2:
387 can be fit into 43 0 times, resulting in a remainder of 43.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 43 to get 43.
Take the next digit (4) from the dividend and append it to 43, then repeat: 434 / 387

Advancing to step 3:
If we divide 434 by 387, we get 1 and a remainder of 47.
Use 1 as the next digit of our solution. 
Result so far: 1.0
The remainder is 47 after subtracting 387 from 434.
Bring next digit (5) of the dividend behind the 47 and repeat the process: 475 / 387

Going ahead to step 4:
387 can be fit into 475 1 times, resulting in a remainder of 88.
The next digit of our result is 1. 
Result so far: 11.0
The remainder is 88 after subtracting 387 from 475.
Include the next digit (3) from the dividend after 88, then repeat: 883 / 387

Advancing to step 5:
If we divide 883 by 387, we get 2 and a remainder of 109.
Use 2 as the next digit of our solution. 
Result so far: 112.0
If we take 774 away from 883, we end up with 109.
Include the next digit (9) from the dividend after 109, then repeat: 1099 / 387

Step 6:
If we divide 1099 by 387, we get 2 and a remainder of 325.
Record the quotient 2 as the next digit in the result. 
Result so far: 1122.0
If we take 774 away from 1099, we end up with 325.
Grab the next digit (8) from the dividend, add it to 325, then carry on: 3258 / 387

On to step 7:
The number 387 fits into 3258 8 times, leaving a remainder of 162.
Use 8 as the next digit of our solution. 
Result so far: 11228.0
Deduct 3096 from 3258 and we're left with 162.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1620, and continue the process.

Moving on to step 8:
The number 387 fits into 1620 4 times, leaving a remainder of 72.
Put 4 as the next digit of the answer. 
Result so far: 11228.4
Subtract 1548 from 1620 to get 72.
Since there are no more digits in the dividend, we add a zero to the remainder making it 720, and continue the process.

Going ahead to step 9:
If we divide 720 by 387, we get 1 and a remainder of 333.
Use 1 as the next digit of our solution. 
Result so far: 11228.41
Deduct 387 from 720 and we're left with 333.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3330, and continue the process.

Going ahead to step 10:
3330 divided by 387 is 8 with a remainder of 234.
Put 8 as the next digit of the answer. 
Result so far: 11228.418
The remainder is 234 after subtracting 3096 from 3330.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2340, and continue the process.

Step 11:
387 goes into 2340 6 times with a remainder of 18.
Put 6 as the next digit of the answer. 
Result so far: 11228.4186
If we subtract 2322 from 2340, we get 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Advancing to step 12:
The number 387 fits into 180 0 times, leaving a remainder of 180.
The next digit of our result is 0. 
Result so far: 11228.4186
If we subtract 0 from 180, we get 180.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1800, and continue the process.

On to step 13:
When dividing 1800 by 387, we get 4 with a remainder of 252.
Put 4 as the next digit of the answer. 
Result so far: 11228.418604
Subtract 1548 from 1800 to get 252.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2520, and continue the process.

Let's proceed to step 14:
2520 divided by 387 is 6 with a remainder of 198.
The next digit of our result is 6. 
Result so far: 11228.4186046
The remainder is 198 after subtracting 2322 from 2520.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1980, and continue the process.

Advancing to step 15:
When dividing 1980 by 387, we get 5 with a remainder of 45.
Use 5 as the next digit of our solution. 
Result so far: 11228.41860465
If we subtract 1935 from 1980, we get 45.
Since there are no more digits in the dividend, we add a zero to the remainder making it 450, and continue the process.

The final result is 11228.41860465 with a remainder of 4.5e-08.