691492 ÷ 45 
The aim is to understand the frequency of 45 in 691492.

Going ahead to step 1:
45 can be fit into 6 0 times, resulting in a remainder of 6.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 6 and we're left with 6.
Fetch the next digit (9) from the dividend, attach it to 6 and continue: 69 / 45

Step 2:
69 divided by 45 is 1 with a remainder of 24.
Use 1 as the next digit of our solution. 
Result so far: 1.0
Deduct 45 from 69 and we're left with 24.
Append the next digit (1) from the dividend to 24 and continue with: 241 / 45

On to step 3:
If we divide 241 by 45, we get 5 and a remainder of 16.
Write down 5 as next digit of the result. 
Result so far: 15.0
If we take 225 away from 241, we end up with 16.
Fetch the next digit (4) from the dividend, attach it to 16 and continue: 164 / 45

Going ahead to step 4:
164 divided by 45 is 3 with a remainder of 29.
The number 3 becomes the next digit in our result. 
Result so far: 153.0
Subtract 135 from 164 to get 29.
Bring next digit (9) of the dividend behind the 29 and repeat the process: 299 / 45

Going ahead to step 5:
If we divide 299 by 45, we get 6 and a remainder of 29.
The next digit of our result is 6. 
Result so far: 1536.0
Deduct 270 from 299 and we're left with 29.
Append the next digit (2) from the dividend to 29 and continue with: 292 / 45

On to step 6:
45 goes into 292 6 times with a remainder of 22.
Write down 6 as next digit of the result. 
Result so far: 15366.0
Deduct 270 from 292 and we're left with 22.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

Going ahead to step 7:
When dividing 220 by 45, we get 4 with a remainder of 40.
Record the quotient 4 as the next digit in the result. 
Result so far: 15366.4
Deduct 180 from 220 and we're left with 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Step 8:
When dividing 400 by 45, we get 8 with a remainder of 40.
Write down 8 as next digit of the result. 
Result so far: 15366.48
If we subtract 360 from 400, we get 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Advancing to step 9:
400 divided by 45 is 8 with a remainder of 40.
The next digit of our result is 8. 
Result so far: 15366.488
If we subtract 360 from 400, we get 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

After the division, we end up with 15366.488 and a remainder of 0.004.