We look at the division of 43080091 by 371 
The aim is to understand the frequency of 371 in 43080091.

Let's proceed to step 1:
371 can be fit into 4 0 times, resulting in a remainder of 4.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 4 after subtracting 0 from 4.
Append the next digit (3) from the dividend to 4 and continue with: 43 / 371

Let's proceed to step 2:
371 goes into 43 0 times with a remainder of 43.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 43, we end up with 43.
Append the next digit (0) from the dividend to 43 and continue with: 430 / 371

Advancing to step 3:
371 can be fit into 430 1 times, resulting in a remainder of 59.
The next digit of our result is 1. 
Result so far: 1.0
The remainder is 59 after subtracting 371 from 430.
Grab the next digit (8) from the dividend, add it to 59, then carry on: 598 / 371

Let's proceed to step 4:
371 can be fit into 598 1 times, resulting in a remainder of 227.
Write down 1 as next digit of the result. 
Result so far: 11.0
Subtracting 371 from 598 leaves us with 227.
Bring next digit (0) of the dividend behind the 227 and repeat the process: 2270 / 371

Moving on to step 5:
371 can be fit into 2270 6 times, resulting in a remainder of 44.
Record the quotient 6 as the next digit in the result. 
Result so far: 116.0
Deduct 2226 from 2270 and we're left with 44.
Fetch the next digit (0) from the dividend, attach it to 44 and continue: 440 / 371

Going ahead to step 6:
371 goes into 440 1 times with a remainder of 69.
Use 1 as the next digit of our solution. 
Result so far: 1161.0
If we subtract 371 from 440, we get 69.
Include the next digit (9) from the dividend after 69, then repeat: 699 / 371

Advancing to step 7:
371 goes into 699 1 times with a remainder of 328.
The number 1 becomes the next digit in our result. 
Result so far: 11611.0
If we take 371 away from 699, we end up with 328.
Include the next digit (1) from the dividend after 328, then repeat: 3281 / 371

Let's proceed to step 8:
371 can be fit into 3281 8 times, resulting in a remainder of 313.
Write down 8 as next digit of the result. 
Result so far: 116118.0
If we subtract 2968 from 3281, we get 313.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3130, and continue the process.

Moving on to step 9:
The number 371 fits into 3130 8 times, leaving a remainder of 162.
Use 8 as the next digit of our solution. 
Result so far: 116118.8
If we take 2968 away from 3130, we end up 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.

On to step 10:
If we divide 1620 by 371, we get 4 and a remainder of 136.
Use 4 as the next digit of our solution. 
Result so far: 116118.84
Deduct 1484 from 1620 and we're left with 136.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1360, and continue the process.

Let's proceed to step 11:
1360 divided by 371 is 3 with a remainder of 247.
Put 3 as the next digit of the answer. 
Result so far: 116118.843
Deduct 1113 from 1360 and we're left with 247.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2470, and continue the process.

On to step 12:
When dividing 2470 by 371, we get 6 with a remainder of 244.
Record the quotient 6 as the next digit in the result. 
Result so far: 116118.8436
Subtract 2226 from 2470 to get 244.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2440, and continue the process.

Moving on to step 13:
371 can be fit into 2440 6 times, resulting in a remainder of 214.
Write down 6 as next digit of the result. 
Result so far: 116118.84366
Subtracting 2226 from 2440 leaves us with 214.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2140, and continue the process.

The final result is 116118.84366 with a remainder of 0.000214.