8558438 divided by 371 
The aim is to understand the frequency of 371 in 8558438.

Going ahead to step 1:
When dividing 8 by 371, we get 0 with a remainder of 8.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 8 to get 8.
Take the next digit (5) from the dividend and append it to 8, then repeat: 85 / 371

Let's proceed to step 2:
When dividing 85 by 371, we get 0 with a remainder of 85.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 85, we end up with 85.
Include the next digit (5) from the dividend after 85, then repeat: 855 / 371

Step 3:
When dividing 855 by 371, we get 2 with a remainder of 113.
The next digit of our result is 2. 
Result so far: 2.0
If we subtract 742 from 855, we get 113.
Fetch the next digit (8) from the dividend, attach it to 113 and continue: 1138 / 371

Advancing to step 4:
1138 divided by 371 is 3 with a remainder of 25.
The next digit of our result is 3. 
Result so far: 23.0
Subtract 1113 from 1138 to get 25.
Grab the next digit (4) from the dividend, add it to 25, then carry on: 254 / 371

Going ahead to step 5:
The number 371 fits into 254 0 times, leaving a remainder of 254.
Use 0 as the next digit of our solution. 
Result so far: 230.0
If we subtract 0 from 254, we get 254.
Bring next digit (3) of the dividend behind the 254 and repeat the process: 2543 / 371

On to step 6:
The number 371 fits into 2543 6 times, leaving a remainder of 317.
The next digit of our result is 6. 
Result so far: 2306.0
If we take 2226 away from 2543, we end up with 317.
Fetch the next digit (8) from the dividend, attach it to 317 and continue: 3178 / 371

Advancing to step 7:
371 can be fit into 3178 8 times, resulting in a remainder of 210.
Record the quotient 8 as the next digit in the result. 
Result so far: 23068.0
Subtract 2968 from 3178 to get 210.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2100, and continue the process.

Going ahead to step 8:
When dividing 2100 by 371, we get 5 with a remainder of 245.
The number 5 becomes the next digit in our result. 
Result so far: 23068.5
Deduct 1855 from 2100 and we're left with 245.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2450, and continue the process.

Let's proceed to step 9:
371 goes into 2450 6 times with a remainder of 224.
Record the quotient 6 as the next digit in the result. 
Result so far: 23068.56
Subtract 2226 from 2450 to get 224.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2240, and continue the process.

Moving on to step 10:
If we divide 2240 by 371, we get 6 and a remainder of 14.
The next digit of our result is 6. 
Result so far: 23068.566
If we subtract 2226 from 2240, we get 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

The final outcome is 23068.566, with a leftover of 0.0014.