12619251 ÷ 825 
The aim is to understand the frequency of 825 in 12619251.

Going ahead to step 1:
If we divide 1 by 825, we get 0 and a remainder of 1.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 1 to get 1.
Bring next digit (2) of the dividend behind the 1 and repeat the process: 12 / 825

On to step 2:
825 can be fit into 12 0 times, resulting in a remainder of 12.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 12 after subtracting 0 from 12.
Grab the next digit (6) from the dividend, add it to 12, then carry on: 126 / 825

Let's proceed to step 3:
The number 825 fits into 126 0 times, leaving a remainder of 126.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 126, we end up with 126.
Include the next digit (1) from the dividend after 126, then repeat: 1261 / 825

Step 4:
1261 divided by 825 is 1 with a remainder of 436.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
Subtracting 825 from 1261 leaves us with 436.
Grab the next digit (9) from the dividend, add it to 436, then carry on: 4369 / 825

Step 5:
825 can be fit into 4369 5 times, resulting in a remainder of 244.
Record the quotient 5 as the next digit in the result. 
Result so far: 15.0
Subtract 4125 from 4369 to get 244.
Append the next digit (2) from the dividend to 244 and continue with: 2442 / 825

Advancing to step 6:
If we divide 2442 by 825, we get 2 and a remainder of 792.
The next digit of our result is 2. 
Result so far: 152.0
Deduct 1650 from 2442 and we're left with 792.
Include the next digit (5) from the dividend after 792, then repeat: 7925 / 825

Step 7:
7925 divided by 825 is 9 with a remainder of 500.
Record the quotient 9 as the next digit in the result. 
Result so far: 1529.0
Subtracting 7425 from 7925 leaves us with 500.
Bring next digit (1) of the dividend behind the 500 and repeat the process: 5001 / 825

Advancing to step 8:
5001 divided by 825 is 6 with a remainder of 51.
Record the quotient 6 as the next digit in the result. 
Result so far: 15296.0
Subtracting 4950 from 5001 leaves us with 51.
Since there are no more digits in the dividend, we add a zero to the remainder making it 510, and continue the process.

Going ahead to step 9:
When dividing 510 by 825, we get 0 with a remainder of 510.
The next digit of our result is 0. 
Result so far: 15296.0
Deduct 0 from 510 and we're left with 510.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5100, and continue the process.

On to step 10:
The number 825 fits into 5100 6 times, leaving a remainder of 150.
Record the quotient 6 as the next digit in the result. 
Result so far: 15296.06
The remainder is 150 after subtracting 4950 from 5100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1500, and continue the process.

On to step 11:
When dividing 1500 by 825, we get 1 with a remainder of 675.
The next digit of our result is 1. 
Result so far: 15296.061
If we take 825 away from 1500, we end up with 675.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6750, and continue the process.

Moving on to step 12:
If we divide 6750 by 825, we get 8 and a remainder of 150.
The number 8 becomes the next digit in our result. 
Result so far: 15296.0618
Subtract 6600 from 6750 to get 150.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1500, and continue the process.

Going ahead to step 13:
If we divide 1500 by 825, we get 1 and a remainder of 675.
Use 1 as the next digit of our solution. 
Result so far: 15296.06181
Deduct 825 from 1500 and we're left with 675.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6750, and continue the process.

Going ahead to step 14:
825 goes into 6750 8 times with a remainder of 150.
The next digit of our result is 8. 
Result so far: 15296.061818
Subtract 6600 from 6750 to get 150.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1500, and continue the process.

Step 15:
When dividing 1500 by 825, we get 1 with a remainder of 675.
The number 1 becomes the next digit in our result. 
Result so far: 15296.0618181
Subtracting 825 from 1500 leaves us with 675.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6750, and continue the process.

Advancing to step 16:
825 can be fit into 6750 8 times, resulting in a remainder of 150.
Record the quotient 8 as the next digit in the result. 
Result so far: 15296.06181818
If we take 6600 away from 6750, we end up with 150.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1500, and continue the process.

The final result is 15296.06181818 with a remainder of 1.5e-07.