894921 ÷ 13 
The aim is to understand the frequency of 13 in 894921.

Let's proceed to step 1:
When dividing 8 by 13, we get 0 with a remainder of 8.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 8 to get 8.
Include the next digit (9) from the dividend after 8, then repeat: 89 / 13

Step 2:
89 divided by 13 is 6 with a remainder of 11.
The next digit of our result is 6. 
Result so far: 6.0
Deduct 78 from 89 and we're left with 11.
Take the next digit (4) from the dividend and append it to 11, then repeat: 114 / 13

Advancing to step 3:
114 divided by 13 is 8 with a remainder of 10.
The next digit of our result is 8. 
Result so far: 68.0
The remainder is 10 after subtracting 104 from 114.
Append the next digit (9) from the dividend to 10 and continue with: 109 / 13

Let's proceed to step 4:
The number 13 fits into 109 8 times, leaving a remainder of 5.
The next digit of our result is 8. 
Result so far: 688.0
Subtract 104 from 109 to get 5.
Append the next digit (2) from the dividend to 5 and continue with: 52 / 13

Going ahead to step 5:
13 goes into 52 4 times with a remainder of 0.
Put 4 as the next digit of the answer. 
Result so far: 6884.0
Subtracting 52 from 52 leaves us with 0.
Include the next digit (1) from the dividend after 0, then repeat: 1 / 13

Step 6:
1 divided by 13 is 0 with a remainder of 1.
The next digit of our result is 0. 
Result so far: 68840.0
Deduct 0 from 1 and we're left with 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Advancing to step 7:
The number 13 fits into 10 0 times, leaving a remainder of 10.
Use 0 as the next digit of our solution. 
Result so far: 68840.0
If we take 0 away from 10, we end up 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.

Step 8:
13 goes into 100 7 times with a remainder of 9.
The number 7 becomes the next digit in our result. 
Result so far: 68840.07
If we take 91 away from 100, we end up with 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Moving on to step 9:
When dividing 90 by 13, we get 6 with a remainder of 12.
The next digit of our result is 6. 
Result so far: 68840.076
Subtracting 78 from 90 leaves us with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Let's proceed to step 10:
13 goes into 120 9 times with a remainder of 3.
Put 9 as the next digit of the answer. 
Result so far: 68840.0769
Subtract 117 from 120 to get 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Moving on to step 11:
13 goes into 30 2 times with a remainder of 4.
The next digit of our result is 2. 
Result so far: 68840.07692
Deduct 26 from 30 and we're left with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Moving on to step 12:
13 goes into 40 3 times with a remainder of 1.
Record the quotient 3 as the next digit in the result. 
Result so far: 68840.076923
Deduct 39 from 40 and we're left with 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Moving on to step 13:
When dividing 10 by 13, we get 0 with a remainder of 10.
Use 0 as the next digit of our solution. 
Result so far: 68840.076923
If we take 0 away from 10, we end up 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.

Going ahead to step 14:
13 can be fit into 100 7 times, resulting in a remainder of 9.
Record the quotient 7 as the next digit in the result. 
Result so far: 68840.07692307
The remainder is 9 after subtracting 91 from 100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

The final outcome is 68840.07692307, with a leftover of 9e-09.