We look at the division of 86421638 by 368 
The aim is to understand the frequency of 368 in 86421638.

Going ahead to step 1:
If we divide 8 by 368, we get 0 and a remainder of 8.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 8 to get 8.
Include the next digit (6) from the dividend after 8, then repeat: 86 / 368

Moving on to step 2:
86 divided by 368 is 0 with a remainder of 86.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 86, we end up with 86.
Grab the next digit (4) from the dividend, add it to 86, then carry on: 864 / 368

On to step 3:
If we divide 864 by 368, we get 2 and a remainder of 128.
Write down 2 as next digit of the result. 
Result so far: 2.0
Deduct 736 from 864 and we're left with 128.
Take the next digit (2) from the dividend and append it to 128, then repeat: 1282 / 368

Step 4:
The number 368 fits into 1282 3 times, leaving a remainder of 178.
The number 3 becomes the next digit in our result. 
Result so far: 23.0
If we subtract 1104 from 1282, we get 178.
Grab the next digit (1) from the dividend, add it to 178, then carry on: 1781 / 368

On to step 5:
368 goes into 1781 4 times with a remainder of 309.
Write down 4 as next digit of the result. 
Result so far: 234.0
If we subtract 1472 from 1781, we get 309.
Fetch the next digit (6) from the dividend, attach it to 309 and continue: 3096 / 368

Step 6:
368 can be fit into 3096 8 times, resulting in a remainder of 152.
Record the quotient 8 as the next digit in the result. 
Result so far: 2348.0
If we subtract 2944 from 3096, we get 152.
Grab the next digit (3) from the dividend, add it to 152, then carry on: 1523 / 368

Let's proceed to step 7:
When dividing 1523 by 368, we get 4 with a remainder of 51.
Use 4 as the next digit of our solution. 
Result so far: 23484.0
If we take 1472 away from 1523, we end up with 51.
Fetch the next digit (8) from the dividend, attach it to 51 and continue: 518 / 368

Moving on to step 8:
518 divided by 368 is 1 with a remainder of 150.
Put 1 as the next digit of the answer. 
Result so far: 234841.0
The remainder is 150 after subtracting 368 from 518.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1500, and continue the process.

Going ahead to step 9:
If we divide 1500 by 368, we get 4 and a remainder of 28.
Use 4 as the next digit of our solution. 
Result so far: 234841.4
The remainder is 28 after subtracting 1472 from 1500.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

On to step 10:
The number 368 fits into 280 0 times, leaving a remainder of 280.
Write down 0 as next digit of the result. 
Result so far: 234841.4
If we take 0 away from 280, we end up with 280.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2800, and continue the process.

Moving on to step 11:
368 can be fit into 2800 7 times, resulting in a remainder of 224.
Write down 7 as next digit of the result. 
Result so far: 234841.407
Subtracting 2576 from 2800 leaves us with 224.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2240, and continue the process.

Advancing to step 12:
If we divide 2240 by 368, we get 6 and a remainder of 32.
Write down 6 as next digit of the result. 
Result so far: 234841.4076
If we take 2208 away from 2240, we end up with 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

Moving on to step 13:
If we divide 320 by 368, we get 0 and a remainder of 320.
Write down 0 as next digit of the result. 
Result so far: 234841.4076
Subtract 0 from 320 to get 320.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3200, and continue the process.

Going ahead to step 14:
368 can be fit into 3200 8 times, resulting in a remainder of 256.
The next digit of our result is 8. 
Result so far: 234841.407608
Subtract 2944 from 3200 to get 256.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2560, and continue the process.

Step 15:
If we divide 2560 by 368, we get 6 and a remainder of 352.
Put 6 as the next digit of the answer. 
Result so far: 234841.4076086
Deduct 2208 from 2560 and we're left with 352.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3520, and continue the process.

Moving on to step 16:
368 can be fit into 3520 9 times, resulting in a remainder of 208.
The number 9 becomes the next digit in our result. 
Result so far: 234841.40760869
If we subtract 3312 from 3520, we get 208.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2080, and continue the process.

After the division, we end up with 234841.40760869 and a remainder of 2.08e-07.