We divide 18725858 by 591
The aim is to understand the frequency of 591 in 18725858.

Step 1:
The number 591 fits into 1 0 times, leaving a remainder of 1.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 1, we get 1.
Append the next digit (8) from the dividend to 1 and continue with: 18 / 591

Going ahead to step 2:
591 goes into 18 0 times with a remainder of 18.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 18 to get 18.
Include the next digit (7) from the dividend after 18, then repeat: 187 / 591

Advancing to step 3:
187 divided by 591 is 0 with a remainder of 187.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 187 and we're left with 187.
Take the next digit (2) from the dividend and append it to 187, then repeat: 1872 / 591

Going ahead to step 4:
591 goes into 1872 3 times with a remainder of 99.
The next digit of our result is 3. 
Result so far: 3.0
Subtract 1773 from 1872 to get 99.
Include the next digit (5) from the dividend after 99, then repeat: 995 / 591

Step 5:
995 divided by 591 is 1 with a remainder of 404.
The number 1 becomes the next digit in our result. 
Result so far: 31.0
Deduct 591 from 995 and we're left with 404.
Grab the next digit (8) from the dividend, add it to 404, then carry on: 4048 / 591

Let's proceed to step 6:
591 goes into 4048 6 times with a remainder of 502.
The number 6 becomes the next digit in our result. 
Result so far: 316.0
Subtracting 3546 from 4048 leaves us with 502.
Grab the next digit (5) from the dividend, add it to 502, then carry on: 5025 / 591

Going ahead to step 7:
591 goes into 5025 8 times with a remainder of 297.
Put 8 as the next digit of the answer. 
Result so far: 3168.0
If we take 4728 away from 5025, we end up with 297.
Fetch the next digit (8) from the dividend, attach it to 297 and continue: 2978 / 591

On to step 8:
591 goes into 2978 5 times with a remainder of 23.
Record the quotient 5 as the next digit in the result. 
Result so far: 31685.0
The remainder is 23 after subtracting 2955 from 2978.
Since there are no more digits in the dividend, we add a zero to the remainder making it 230, and continue the process.

Moving on to step 9:
If we divide 230 by 591, we get 0 and a remainder of 230.
Put 0 as the next digit of the answer. 
Result so far: 31685.0
If we subtract 0 from 230, we get 230.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2300, and continue the process.

Moving on to step 10:
591 goes into 2300 3 times with a remainder of 527.
Put 3 as the next digit of the answer. 
Result so far: 31685.03
Subtracting 1773 from 2300 leaves us with 527.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5270, and continue the process.

Moving on to step 11:
591 can be fit into 5270 8 times, resulting in a remainder of 542.
Write down 8 as next digit of the result. 
Result so far: 31685.038
Subtract 4728 from 5270 to get 542.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5420, and continue the process.

Let's proceed to step 12:
591 goes into 5420 9 times with a remainder of 101.
Write down 9 as next digit of the result. 
Result so far: 31685.0389
Subtract 5319 from 5420 to get 101.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1010, and continue the process.

Moving on to step 13:
The number 591 fits into 1010 1 times, leaving a remainder of 419.
Put 1 as the next digit of the answer. 
Result so far: 31685.03891
Subtracting 591 from 1010 leaves us with 419.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4190, and continue the process.

Advancing to step 14:
When dividing 4190 by 591, we get 7 with a remainder of 53.
The next digit of our result is 7. 
Result so far: 31685.038917
If we take 4137 away from 4190, we end up with 53.
Since there are no more digits in the dividend, we add a zero to the remainder making it 530, and continue the process.

On to step 15:
591 goes into 530 0 times with a remainder of 530.
The number 0 becomes the next digit in our result. 
Result so far: 31685.038917
If we take 0 away from 530, we end up with 530.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5300, and continue the process.

Let's proceed to step 16:
5300 divided by 591 is 8 with a remainder of 572.
Record the quotient 8 as the next digit in the result. 
Result so far: 31685.03891708
Subtracting 4728 from 5300 leaves us with 572.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5720, and continue the process.

Our division results in 31685.03891708 with a remaining 5.72e-07.