Let's divide 51134251 by 591
The aim is to understand the frequency of 591 in 51134251.

Step 1:
If we divide 5 by 591, we get 0 and a remainder of 5.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 5 to get 5.
Fetch the next digit (1) from the dividend, attach it to 5 and continue: 51 / 591

Moving on to step 2:
51 divided by 591 is 0 with a remainder of 51.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 51, we get 51.
Bring next digit (1) of the dividend behind the 51 and repeat the process: 511 / 591

Let's proceed to step 3:
The number 591 fits into 511 0 times, leaving a remainder of 511.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 511 leaves us with 511.
Take the next digit (3) from the dividend and append it to 511, then repeat: 5113 / 591

Step 4:
If we divide 5113 by 591, we get 8 and a remainder of 385.
Record the quotient 8 as the next digit in the result. 
Result so far: 8.0
Deduct 4728 from 5113 and we're left with 385.
Include the next digit (4) from the dividend after 385, then repeat: 3854 / 591

Let's proceed to step 5:
591 can be fit into 3854 6 times, resulting in a remainder of 308.
Write down 6 as next digit of the result. 
Result so far: 86.0
Deduct 3546 from 3854 and we're left with 308.
Grab the next digit (2) from the dividend, add it to 308, then carry on: 3082 / 591

Advancing to step 6:
591 goes into 3082 5 times with a remainder of 127.
The number 5 becomes the next digit in our result. 
Result so far: 865.0
If we take 2955 away from 3082, we end up with 127.
Bring next digit (5) of the dividend behind the 127 and repeat the process: 1275 / 591

Step 7:
The number 591 fits into 1275 2 times, leaving a remainder of 93.
The number 2 becomes the next digit in our result. 
Result so far: 8652.0
Subtract 1182 from 1275 to get 93.
Include the next digit (1) from the dividend after 93, then repeat: 931 / 591

Moving on to step 8:
If we divide 931 by 591, we get 1 and a remainder of 340.
Put 1 as the next digit of the answer. 
Result so far: 86521.0
If we subtract 591 from 931, we get 340.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3400, and continue the process.

On to step 9:
591 can be fit into 3400 5 times, resulting in a remainder of 445.
Record the quotient 5 as the next digit in the result. 
Result so far: 86521.5
If we take 2955 away from 3400, we end up with 445.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4450, and continue the process.

Going ahead to step 10:
If we divide 4450 by 591, we get 7 and a remainder of 313.
Put 7 as the next digit of the answer. 
Result so far: 86521.57
Deduct 4137 from 4450 and we're left with 313.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3130, and continue the process.

Advancing to step 11:
If we divide 3130 by 591, we get 5 and a remainder of 175.
Write down 5 as next digit of the result. 
Result so far: 86521.575
Subtract 2955 from 3130 to get 175.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1750, and continue the process.

On to step 12:
When dividing 1750 by 591, we get 2 with a remainder of 568.
The number 2 becomes the next digit in our result. 
Result so far: 86521.5752
Deduct 1182 from 1750 and we're left with 568.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5680, and continue the process.

Step 13:
When dividing 5680 by 591, we get 9 with a remainder of 361.
Use 9 as the next digit of our solution. 
Result so far: 86521.57529
Subtracting 5319 from 5680 leaves us with 361.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3610, and continue the process.

Advancing to step 14:
The number 591 fits into 3610 6 times, leaving a remainder of 64.
Put 6 as the next digit of the answer. 
Result so far: 86521.575296
Subtract 3546 from 3610 to get 64.
Since there are no more digits in the dividend, we add a zero to the remainder making it 640, and continue the process.

Advancing to step 15:
591 can be fit into 640 1 times, resulting in a remainder of 49.
The next digit of our result is 1. 
Result so far: 86521.5752961
If we take 591 away from 640, we end up with 49.
Since there are no more digits in the dividend, we add a zero to the remainder making it 490, and continue the process.

Let's proceed to step 16:
If we divide 490 by 591, we get 0 and a remainder of 490.
Use 0 as the next digit of our solution. 
Result so far: 86521.5752961
If we take 0 away from 490, we end up with 490.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4900, and continue the process.

The final outcome is 86521.5752961, with a leftover of 4.9e-07.