We look at the division of 987091 by 69 
The aim is to understand the frequency of 69 in 987091.

Step 1:
When dividing 9 by 69, we get 0 with a remainder of 9.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 9 leaves us with 9.
Fetch the next digit (8) from the dividend, attach it to 9 and continue: 98 / 69

On to step 2:
The number 69 fits into 98 1 times, leaving a remainder of 29.
Use 1 as the next digit of our solution. 
Result so far: 1.0
The remainder is 29 after subtracting 69 from 98.
Fetch the next digit (7) from the dividend, attach it to 29 and continue: 297 / 69

Let's proceed to step 3:
297 divided by 69 is 4 with a remainder of 21.
Use 4 as the next digit of our solution. 
Result so far: 14.0
Subtracting 276 from 297 leaves us with 21.
Take the next digit (0) from the dividend and append it to 21, then repeat: 210 / 69

Advancing to step 4:
The number 69 fits into 210 3 times, leaving a remainder of 3.
Record the quotient 3 as the next digit in the result. 
Result so far: 143.0
Subtract 207 from 210 to get 3.
Fetch the next digit (9) from the dividend, attach it to 3 and continue: 39 / 69

Step 5:
39 divided by 69 is 0 with a remainder of 39.
The number 0 becomes the next digit in our result. 
Result so far: 1430.0
Subtract 0 from 39 to get 39.
Append the next digit (1) from the dividend to 39 and continue with: 391 / 69

Going ahead to step 6:
69 goes into 391 5 times with a remainder of 46.
Record the quotient 5 as the next digit in the result. 
Result so far: 14305.0
Deduct 345 from 391 and we're left with 46.
Since there are no more digits in the dividend, we add a zero to the remainder making it 460, and continue the process.

Advancing to step 7:
460 divided by 69 is 6 with a remainder of 46.
The number 6 becomes the next digit in our result. 
Result so far: 14305.6
Subtracting 414 from 460 leaves us with 46.
Since there are no more digits in the dividend, we add a zero to the remainder making it 460, and continue the process.

Let's proceed to step 8:
460 divided by 69 is 6 with a remainder of 46.
Write down 6 as next digit of the result. 
Result so far: 14305.66
Subtract 414 from 460 to get 46.
Since there are no more digits in the dividend, we add a zero to the remainder making it 460, and continue the process.

The final result is 14305.66 with a remainder of 0.046.