7390636 ÷ 921 
The aim is to understand the frequency of 921 in 7390636.

Advancing to step 1:
921 goes into 7 0 times with a remainder of 7.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 7, we get 7.
Append the next digit (3) from the dividend to 7 and continue with: 73 / 921

Step 2:
921 can be fit into 73 0 times, resulting in a remainder of 73.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 73, we get 73.
Bring next digit (9) of the dividend behind the 73 and repeat the process: 739 / 921

Going ahead to step 3:
739 divided by 921 is 0 with a remainder of 739.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 739, we get 739.
Bring next digit (0) of the dividend behind the 739 and repeat the process: 7390 / 921

Let's proceed to step 4:
The number 921 fits into 7390 8 times, leaving a remainder of 22.
The number 8 becomes the next digit in our result. 
Result so far: 8.0
Subtract 7368 from 7390 to get 22.
Grab the next digit (6) from the dividend, add it to 22, then carry on: 226 / 921

On to step 5:
If we divide 226 by 921, we get 0 and a remainder of 226.
The number 0 becomes the next digit in our result. 
Result so far: 80.0
The remainder is 226 after subtracting 0 from 226.
Append the next digit (3) from the dividend to 226 and continue with: 2263 / 921

Step 6:
The number 921 fits into 2263 2 times, leaving a remainder of 421.
Use 2 as the next digit of our solution. 
Result so far: 802.0
Deduct 1842 from 2263 and we're left with 421.
Bring next digit (6) of the dividend behind the 421 and repeat the process: 4216 / 921

Going ahead to step 7:
921 goes into 4216 4 times with a remainder of 532.
Use 4 as the next digit of our solution. 
Result so far: 8024.0
If we subtract 3684 from 4216, we get 532.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5320, and continue the process.

Let's proceed to step 8:
When dividing 5320 by 921, we get 5 with a remainder of 715.
Put 5 as the next digit of the answer. 
Result so far: 8024.5
Deduct 4605 from 5320 and we're left with 715.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7150, and continue the process.

Step 9:
921 can be fit into 7150 7 times, resulting in a remainder of 703.
The next digit of our result is 7. 
Result so far: 8024.57
Subtract 6447 from 7150 to get 703.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7030, and continue the process.

Let's proceed to step 10:
The number 921 fits into 7030 7 times, leaving a remainder of 583.
Record the quotient 7 as the next digit in the result. 
Result so far: 8024.577
The remainder is 583 after subtracting 6447 from 7030.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5830, and continue the process.

After the division, we end up with 8024.577 and a remainder of 0.0583.