90389390 ÷ 625 
The aim is to understand the frequency of 625 in 90389390.

Going ahead to step 1:
The number 625 fits into 9 0 times, leaving a remainder of 9.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 9, we get 9.
Bring next digit (0) of the dividend behind the 9 and repeat the process: 90 / 625

Let's proceed to step 2:
625 can be fit into 90 0 times, resulting in a remainder of 90.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 90 leaves us with 90.
Bring next digit (3) of the dividend behind the 90 and repeat the process: 903 / 625

Let's proceed to step 3:
The number 625 fits into 903 1 times, leaving a remainder of 278.
The next digit of our result is 1. 
Result so far: 1.0
If we subtract 625 from 903, we get 278.
Fetch the next digit (8) from the dividend, attach it to 278 and continue: 2788 / 625

On to step 4:
2788 divided by 625 is 4 with a remainder of 288.
The next digit of our result is 4. 
Result so far: 14.0
The remainder is 288 after subtracting 2500 from 2788.
Append the next digit (9) from the dividend to 288 and continue with: 2889 / 625

Let's proceed to step 5:
2889 divided by 625 is 4 with a remainder of 389.
Record the quotient 4 as the next digit in the result. 
Result so far: 144.0
Subtracting 2500 from 2889 leaves us with 389.
Take the next digit (3) from the dividend and append it to 389, then repeat: 3893 / 625

Going ahead to step 6:
When dividing 3893 by 625, we get 6 with a remainder of 143.
Use 6 as the next digit of our solution. 
Result so far: 1446.0
If we take 3750 away from 3893, we end up with 143.
Bring next digit (9) of the dividend behind the 143 and repeat the process: 1439 / 625

On to step 7:
If we divide 1439 by 625, we get 2 and a remainder of 189.
Put 2 as the next digit of the answer. 
Result so far: 14462.0
If we take 1250 away from 1439, we end up with 189.
Bring next digit (0) of the dividend behind the 189 and repeat the process: 1890 / 625

On to step 8:
If we divide 1890 by 625, we get 3 and a remainder of 15.
Record the quotient 3 as the next digit in the result. 
Result so far: 144623.0
Subtract 1875 from 1890 to get 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

On to step 9:
625 can be fit into 150 0 times, resulting in a remainder of 150.
Record the quotient 0 as the next digit in the result. 
Result so far: 144623.0
Subtract 0 from 150 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.

On to step 10:
625 can be fit into 1500 2 times, resulting in a remainder of 250.
Use 2 as the next digit of our solution. 
Result so far: 144623.02
If we subtract 1250 from 1500, we get 250.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2500, and continue the process.

On to step 11:
2500 divided by 625 is 4 with a remainder of 0.
Use 4 as the next digit of our solution. 
Result so far: 144623.024
If we subtract 2500 from 2500, 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.

Advancing to step 12:
When dividing 0 by 625, we get 0 with a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 144623.024
If we subtract 0 from 0, 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.

On to step 13:
625 can be fit into 0 0 times, resulting in a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 144623.024
If we subtract 0 from 0, 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.

Our division results in 144623.024 with a remaining 0.0.