We're dividing 370821 by 25 
The aim is to understand the frequency of 25 in 370821.

Advancing to step 1:
25 can be fit into 3 0 times, resulting in a remainder of 3.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 3 and we're left with 3.
Take the next digit (7) from the dividend and append it to 3, then repeat: 37 / 25

On to step 2:
If we divide 37 by 25, we get 1 and a remainder of 12.
Write down 1 as next digit of the result. 
Result so far: 1.0
Subtracting 25 from 37 leaves us with 12.
Bring next digit (0) of the dividend behind the 12 and repeat the process: 120 / 25

Advancing to step 3:
25 can be fit into 120 4 times, resulting in a remainder of 20.
Record the quotient 4 as the next digit in the result. 
Result so far: 14.0
Subtract 100 from 120 to get 20.
Bring next digit (8) of the dividend behind the 20 and repeat the process: 208 / 25

Advancing to step 4:
208 divided by 25 is 8 with a remainder of 8.
Write down 8 as next digit of the result. 
Result so far: 148.0
The remainder is 8 after subtracting 200 from 208.
Grab the next digit (2) from the dividend, add it to 8, then carry on: 82 / 25

On to step 5:
25 goes into 82 3 times with a remainder of 7.
The number 3 becomes the next digit in our result. 
Result so far: 1483.0
If we take 75 away from 82, we end up with 7.
Include the next digit (1) from the dividend after 7, then repeat: 71 / 25

On to step 6:
The number 25 fits into 71 2 times, leaving a remainder of 21.
Use 2 as the next digit of our solution. 
Result so far: 14832.0
The remainder is 21 after subtracting 50 from 71.
Since there are no more digits in the dividend, we add a zero to the remainder making it 210, and continue the process.

Advancing to step 7:
25 goes into 210 8 times with a remainder of 10.
Put 8 as the next digit of the answer. 
Result so far: 14832.8
Deduct 200 from 210 and we're left with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Advancing to step 8:
When dividing 100 by 25, we get 4 with a remainder of 0.
Use 4 as the next digit of our solution. 
Result so far: 14832.84
If we subtract 100 from 100, we get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Let's proceed to step 9:
The number 25 fits into 0 0 times, leaving a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 14832.84
The remainder is 0 after subtracting 0 from 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Going ahead to step 10:
The number 25 fits into 0 0 times, leaving a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 14832.84
If we take 0 away from 0, we end up with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

After the division, we end up with 14832.84 and a remainder of 0.0.