Let's divide 25836409 by 431
The aim is to understand the frequency of 431 in 25836409.

On to step 1:
When dividing 2 by 431, we get 0 with a remainder of 2.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 2, we get 2.
Bring next digit (5) of the dividend behind the 2 and repeat the process: 25 / 431

Step 2:
431 can be fit into 25 0 times, resulting in a remainder of 25.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 25 leaves us with 25.
Take the next digit (8) from the dividend and append it to 25, then repeat: 258 / 431

Step 3:
The number 431 fits into 258 0 times, leaving a remainder of 258.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 258 leaves us with 258.
Fetch the next digit (3) from the dividend, attach it to 258 and continue: 2583 / 431

Going ahead to step 4:
The number 431 fits into 2583 5 times, leaving a remainder of 428.
Write down 5 as next digit of the result. 
Result so far: 5.0
If we take 2155 away from 2583, we end up with 428.
Grab the next digit (6) from the dividend, add it to 428, then carry on: 4286 / 431

Moving on to step 5:
431 can be fit into 4286 9 times, resulting in a remainder of 407.
Put 9 as the next digit of the answer. 
Result so far: 59.0
Subtract 3879 from 4286 to get 407.
Grab the next digit (4) from the dividend, add it to 407, then carry on: 4074 / 431

Advancing to step 6:
When dividing 4074 by 431, we get 9 with a remainder of 195.
The number 9 becomes the next digit in our result. 
Result so far: 599.0
Subtract 3879 from 4074 to get 195.
Grab the next digit (0) from the dividend, add it to 195, then carry on: 1950 / 431

Let's proceed to step 7:
If we divide 1950 by 431, we get 4 and a remainder of 226.
The number 4 becomes the next digit in our result. 
Result so far: 5994.0
If we take 1724 away from 1950, we end up with 226.
Grab the next digit (9) from the dividend, add it to 226, then carry on: 2269 / 431

Moving on to step 8:
431 can be fit into 2269 5 times, resulting in a remainder of 114.
Record the quotient 5 as the next digit in the result. 
Result so far: 59945.0
Deduct 2155 from 2269 and we're left with 114.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1140, and continue the process.

Step 9:
431 can be fit into 1140 2 times, resulting in a remainder of 278.
Write down 2 as next digit of the result. 
Result so far: 59945.2
If we subtract 862 from 1140, we get 278.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2780, and continue the process.

On to step 10:
If we divide 2780 by 431, we get 6 and a remainder of 194.
The next digit of our result is 6. 
Result so far: 59945.26
If we take 2586 away from 2780, we end up with 194.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1940, and continue the process.

On to step 11:
The number 431 fits into 1940 4 times, leaving a remainder of 216.
The number 4 becomes the next digit in our result. 
Result so far: 59945.264
Deduct 1724 from 1940 and we're left with 216.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2160, and continue the process.

Advancing to step 12:
If we divide 2160 by 431, we get 5 and a remainder of 5.
The number 5 becomes the next digit in our result. 
Result so far: 59945.2645
Deduct 2155 from 2160 and we're left with 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

On to step 13:
When dividing 50 by 431, we get 0 with a remainder of 50.
The number 0 becomes the next digit in our result. 
Result so far: 59945.2645
Subtract 0 from 50 to get 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

Going ahead to step 14:
When dividing 500 by 431, we get 1 with a remainder of 69.
The next digit of our result is 1. 
Result so far: 59945.264501
If we subtract 431 from 500, we get 69.
Since there are no more digits in the dividend, we add a zero to the remainder making it 690, and continue the process.

On to step 15:
The number 431 fits into 690 1 times, leaving a remainder of 259.
Record the quotient 1 as the next digit in the result. 
Result so far: 59945.2645011
Subtracting 431 from 690 leaves us with 259.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2590, and continue the process.

Our division results in 59945.2645011 with a remaining 2.59e-06.